Skip to data content Skip to data search
Earth Observing Laboratory
Field Data Archive

Dataset List

    14578 datasets found (100 shown). Full dataset descriptions and data access links are available by selecting the dataset title.
    Max results:
    Dataset Projects Responsible parties Version/Date
    This dataset links to supplemental information for the project.
    • IHOP_2002
    final completed
    This dataset links to supplemental information for the project.
    • IHOP_2002
    final completed
    This is one of the upper air data sets developed for the International H20 Project 2002 (IHOP 2002). This data set contains rawinsonde profiles from the Homestead site located in the Oklahoma Panhandle. Rawinsondes were released from May 12th to June 2...
    • IHOP_2002
    final 1.0
    2011-08-24
    This dataset contains the Scanning Raman Lidar data from the IHOP_2002 field campaign. Some data have been reprocessed on August 2, 2004 and updated for Revision 4, the final revision. Only water vapor data is included, along with images of water vapor...
    • IHOP_2002
    final 1.0
    2007-10-24
    This dataset includes Homestead Scanning Raman Lidar GIF imagery. Each day included in this dataset has three images: aerosol depolarization, aerosol scattering ratio, and water vapor.
    • IHOP_2002
    final 1.0
    2008-10-07
    This dataset links to supplemental information for the project.
    • IHOP_2002
    final completed
    This data set contains 2.5umum-10um coarse mass (ng/m3) measured using the GENT SFU system for the ACE ASIA project.
    • ACE-ASIA
    final 1.0
    2003-05-16
    This data set contains PM2.5 fine mass (ng/m3) measured using the IMPROVE cyclone system for the ACE ASIA project.
    • ACE-ASIA
    final 1.0
    2003-05-16
    This dataset contains imagery of the horizontal variation in surface radiative fluxes from the SHEBA camp as a part of the Surface Heat Budget of the Arctic Ocean (SHEBA) Project. Data collected during 16 missions of the NCAR C-130 over the SHEBA camp...
    • SHEBA
    1.0
    2007-11-02
    This data set provides data for sediment core HLY0503-8JPC (Healy-Oden Trans-Arctic Expedition 2005 (HOTRAX 2005), 2nd leg), a key record for developing an up-to-date stratigraphy for Mid-Late Quaternary sediments in the western Arctic Ocean.
    • ARCSS
    • ACADIS
    final 1.0
    2011-11-07
    This data set consists of the hourly and special METAR surface observations from 39 sites within the UMRBPP region. The data were retrieved from the Pennsylvania State University for the UMRBPP period (5 April to 5 May 1999. The data are in METAR...
    • GCIP/LSA-NW-99
    • UMRBPP
    final 1.0
    1999-05-07
    This dataset contains temperature data of the Forest Site measured hourly. All data are from Council, Seward Peninsula. For more information, see the readme file.
    • ATLAS
    1.0
    2007-11-02
    This dataset contains temperature data of the Shrub Site measured hourly. All data are from Council, Seward Peninsula. For more information, see the readme file.
    • ATLAS
    1.0
    2007-11-02
    This dataset contains temperature data of the Tundra Site measured hourly. All data are from Council, Seward Peninsula. For more information, see the readme file.
    • ATLAS
    1.0
    2007-11-02
    This dataset contains temperature data of the Woodland Site measured hourly. All data are from Council, Seward Peninsula. For more information, see the readme file.
    • ATLAS
    1.0
    2007-11-02
    This data set consists of hourly Missouri Basin River Forecast Center (MBRFC) Stage III WSR-88D radar imagery in GIF format. The data were retrieved from the MBRFC.
    • UMRBPP
    final 1.0
    2011-09-14
    The Hourly Precipitation Composite was formed from several data sources (i.e., National Climatic Data Center Hourly Precipitation data, National Centers for Environmental Prediction, and the precipitation data extracted from the NESOB-97 Hourly Surface...
    • GCIP/NESOB-97
    • SGP97
    final 1.0
    2011-08-24
    The GIDS-1 Hourly Surface Composite contains surface and sea level pressure, temperature, dew point temperature, wind speed and direction, and precipitation observations from surface observing sites in the central United States. Visibility, present...
    • GCIP/GIDS-1
    final 1.0
    2011-08-24
    The Lake-ICE Hourly Surface Composite contains data from several networks (i.e., Automated Surface Observing System, High Plains Climate Network, Great Lakes Environmental Research Laboratory, NOAA Profiler Network, Illinois Climate Network, University...
    • Lake-ICE
    final 1.0
    2011-08-24
    This dataset contains hourly, 50-meter resolution land surface temperature data for the 30x30 km CHEESEHEAD domain derived from the fusion of NLDAS-2 modeled land surface temperature, GOES-16 geostationary satellite land surface temperature, and...
    • CHEESEHEAD
    final 1.0
    2021-05-06
    This dataset includes microfilm of the regular data dumps during Phase I, as well as the Pre and Inter Phases, of the Global Atmospheric Research Program's (GARP) Atlantic Tropical Experiment (GATE). Phase is specified in the "Description" section on...
    • GATE
    final 1.0
    2017-11-09
    Houston Lightning Mapping Array (HLMA) post-processed (L2+) data, collected during the ESCAPE (Experiment of Sea Breeze Convection, Aerosols, Precipitation, and Environment) field campaign IOP period (6 June - 31 July 2022), and the remaining DOE...
    • ESCAPE
    final 1.0
    2023-08-15
    This dataset consists of Hovmoller GOES-13 and Meteosat-9 jpeg images from the PRE-Depression Investigation of Cloud-systems in the Tropics (PREDICT) project.
    • PREDICT
    final 1.0
    2021-09-30
    This dataset links to supplemental information for the project.
    • AMMA
    final completed
    This dataset links to supplemental information for the project.
    • AMMA
    final completed
    This is one of the upper air data sets developed for the Pre-Depression Investigation of Cloud-systems in the Tropics (PREDICT) project. This data set includes 99 high vertical resolution (4 second) soundings from Barbados taken by Howard University...
    • PREDICT
    final 1.0
    2021-09-30
    This is one of the upper air data sets developed for the Pre-Depression Investigation of Cloud-systems in the Tropics (PREDICT) project. This data set includes 99 high vertical resolution (4 second) soundings from Barbados taken by Howard University...
    • PREDICT
    final 1.0
    2021-09-30
    This is one of the upper air data sets developed for the Pre-Depression Investigation of Cloud-systems in the Tropics (PREDICT) project. This data set includes 20 high vertical resolution (2 second) soundings from Cape Verde taken by Howard University...
    • PREDICT
    final 1.0
    2021-09-30
    The HPC North America Surface Analysis Imagery (GIF)is one of several surface products collected as part of the Dynamics and Chemistry of Marine Stratocumulus PhaseII: Entrainment Studies (DYCOMS-II) project field catalogoperated by the National Center...
    • DYCOMS-II
    final 1.0
    2008-05-15
    The HPC Surface Analysis and Infrared Satellite Composite Imagery (GIF)is one of several surface products collected as part of the Dynamics and Chemistry of Marine Stratocumulus PhaseII: Entrainment Studies (DYCOMS-II) project field catalogoperated by...
    • DYCOMS-II
    final 1.0
    2008-05-15
    This data set contains NSF/NCAR C-130 CSU HR-ToF-AMS Fine-Mode Aerosol Composition Data collected during the WE-CAN (Western Wildfire Experiment for Cloud Chemistry, Aerosol, Absorption and Nitrogen) field project from 24 July through 13 September 2018...
    • WE-CAN
    final 1.0
    2019-05-13
    HRD wind analysis requires input of all available surface weather observations (e.g., ships, buoys, coastal platforms, surface aviation reports, reconnaissance aircraft data adjusted to surface, etc.). These data are downloaded on a regular schedule...
    • RAINEX
    final 1.0
    2007-11-05
    This dataset contains HRD horizontal winds imagery produced in ZEBRA. The area covered by each image is event specific.
    • RAINEX
    final 1.0
    2008-10-07
    This dataset contains HRDL Data in netCDF collected during the CASES-99 Experiment near Leon, Kansas. For more information, please see the README file.
    • CASES-99
    final 1.0
    2022-01-13
    This dataset contains the HRRR and NAM Model Imagery for the Instabilities, Dynamics and Energetics accompanying Atmospheric Layering (IDEAL) project from the University of Utah. The files are in GIF image format. 
    • IDEAL
    final 1.0
    2018-03-02
    NOAA/NASA Global Hawk Dropsonde data from two research flights conducted on September 9 and 14, 2011 for the Hurricane and Severe Storm Sentinel (HS3) project. The GH is equipped with an NCAR/NOAA dropsonde system specially designed for remote...
    • HS3
    final 3.0
    2016-07-29
    NOAA/NASA Global Hawk Dropsonde data from six research flights conducted between September 7 and 26, 2012 for the Hurricane and Severe Storm Sentinel (HS3) project. The GH is equipped with an NCAR/NOAA dropsonde system specially designed for remote...
    • HS3
    final 6.0
    2018-07-13
    NOAA/NASA Global Hawk dropsonde data from seven research flights conducted between 20 August and 19 September 2013 for the Hurricane and Severe Storm Sentinel (HS3) project. The GH is equipped with an NCAR/NOAA dropsonde system specially designed for...
    • HS3
    final 5.0
    2016-07-29
    NOAA/NASA Global Hawk Dropsonde sounding profiles collected during 11 research flights between August 26 and September 30 2014 during the NASA Hurricane and Severe Storm Sentinel (HS3) campaign. The GH is equipped with an NCAR/NOAA dropsonde system...
    • HS3
    final 3.0
    2016-07-29
    This dataset contains Aerosol Optical Depth measurements taken at the Hulule International Airport during the INDOEX time period.
    • INDOEX
    final 1.0
    2007-11-07
    This data set contains height profiles of particle backscatter coefficient, particle extinction coefficient and particle lidar ratio at 532 nm derived from the six-wavelength lidar measurements at Hulule (4.1 N, 73.3 E) during INDOEX.
    • INDOEX
    final 1.0
    2007-11-07
    This dataset consists of rawinsonde data collected during INDOEX from Hulule Island. Each datafile contains the island's location, the sonde's UTC release time, and a vertical profile of pressure, temperature, humidity, latitude and longitude, every 5...
    • INDOEX
    final 1.0
    2007-11-07
    This data set contains detailed community information for regions of Canada and Alaska. These data are utilized in the Arctic Rapid Integrated Monitoring System (ArcticRIMS) project to improve the development of the water stress model. This water...
    • ARCSS
    1.0
    2010-12-13
    This data set contains water use information for Canadian and Alaskan communities as well as general water-use estimates provided by the United States Geological Survey (USGS) for the whole of the United States. These data are utilized in the Arctic...
    • ARCSS
    1.0
    2010-12-13
    This data set contains the ocean surface wind speed and rain rate data as well as excess brightness temperature data in tropical storms and hurricanes from the Hurricane Imaging Radiometer (HIRAD) instrument that flew on board the NASA WB-57 aircraft...
    • TCI
    final 2.1
    2016-10-18
    The HVPS-3 instrument, or High Volume Precipitation Spectrometer, is an open path optical array probe.  Unlike the 2D-S, the HVPS has a single channel, which images cloud particles between about 150 microns - 19 mm in size, with 150 micron resolution,...
    • CAESAR
    final 1.0
    2025-04-17
    The HVPS-3 instrument, or High Volume Precipitation Spectrometer, is an open path optical array probe. Unlike the 2D-S, the HVPS has a single channel, which images cloud particles between about 150 microns - 19 mm in size, with 150 micron resolution,...
    • CAESAR
    preliminary 0.1
    2024-05-23
    This is edited ship's Acoustic Doppler Current Profiler (ADCP) and Sea Surface (SS) underway data from the Alpha Helix mooring recovery and redeployment cruise August and September 2000. Data processed by Seth Danielson, University of Alaska Fairbanks ...
    • SBI
    1.0
    2007-11-05
    This is edited ship's Acoustic Doppler Current Profiler (ADCP) and SS (sea surface) underway data from the Alpha Helix mooring recovery and redeployment cruise September 2001. Data processed by Seth Danielson, University of Alaska Fairbanks (UAF). ADCP...
    • SBI
    1.0
    2007-11-05
    This is edited ship's Acoustic Doppler Current Profiler (ADCP) and Sea Surface (SS) underway data from the Alpha Helix mooring recovery and redeployment cruise June 2002. Data processed by Seth Danielson, University of Alaska Fairbanks (UAF). ADCP data...
    • SBI
    1.0
    2007-11-05
    This is edited ship's Acoustic Doppler Current Profiler (ADCP) and Sea Surface (SS) underway data from the Alpha Helix mooring recovery and redeployment cruise June 2003 and July 2003. Data processed by Seth Danielson, University of Alaska Fairbanks ...
    • SBI
    1.0
    2007-11-05
    This is calibrated Conductivity, Temperature, Depth (CTD) downcast data from the Alpha Helix Cruise HX235, a mooring recovery and redeployment cruise during August and September 2000. Data were post calibrated and adjusted to bottle samples by Seth...
    • SBI
    1.0
    2007-11-05
    This is calibrated Conductivity, Temperature, Depth (CTD) downcast data from the Alpha Helix Cruise HX250, a mooring recovery and redeployment cruise during August and September 2001. Data were post calibrated and adjusted to bottle samples by Seth...
    • SBI
    1.0
    2007-11-05
    This is calibrated Conductivity, Temperature, Depth (CTD) downcast data from the Alpha Helix Cruise, mooring recovery and redeployment cruise June 2002. Data were post calibrated and adjusted to bottle samples by Seth Danielson of the University of...
    • SBI
    1.0
    2007-11-05
    This is calibrated Conductivity, Temperature, Depth (CTD) downcast data from the Alpha Helix Cruise HX274, a mooring recovery and redeployment cruise during June and July 2003. Data were post calibrated and adjusted to bottle samples by Seth Danielson...
    • SBI
    1.0
    2007-11-05
    This is calibrated Conductivity, Temperature, Depth (CTD) downcast data from the Alpha Helix Cruise HX290, a mooring recovery and redeployment cruise during August and September 2004. Data were post calibrated and adjusted to bottle samples by Seth...
    • SBI
    1.0
    2007-11-05
    This dataset links to supplemental information for the project.
    • ITOP
    final completed
    This dataset provides a link to the HyCRISTAL project website.
    • HIGHWAY
    final completed
    HYDRO1k is a geographic database developed to provide comprehensive and consistent global coverage of topographically derived data sets, including streams, drainage basins and ancillary layers derived from the USGS' 30 arc-second digital elevation...
    • GCIP/EAOP-99
    • IHOP_2002
    • T-REX
    • GCIP/ESOP-95
    • GCIP/ESOP-96
    • GCIP/ESOP-98
    • GCIP/GIST
    • GCIP/NESOB-96
    • BAMEX
    • GCIP/LSA-NW-00
    • GCIP/EAOP-98
    • GCIP/NESOB-97
    • GCIP/EOP
    • GCIP/ESOP-97
    • GCIP/LSA-NW-99
    This data set contains Satellite Hydro-Estimator estimates. For more information please see NESDIS/"Hydro-Estimatior" Estimates.
    • NAME
    final 1.0
    2007-10-24
    This data set includes data for the following parameters: dissolved barium; bottom depth; pressure; temperature; salinity; dissolved oxygen; phosphate; siliceous acid; nitrate; nitrite; and oxygen isotopic composition of seawater. The data set is a...
    • ARCSS
    1.0
    2009-04-29
    This dataset contains Hydrometeor Mask and Cloud Boundaries data calculated by combining data collected by the NSF/NCAR GV HIAPER (Gulfstream-V High-performance Instrumented Airborne Platform for Environmental Research) (N677F) Cloud Radar (HCR) and...
    • CSET
    final 1.0
    2016-11-28
    This dataset contains a link to the Hydrometeorological Automated Data System (HADS) website.
    • SAS
    • VORTEX2
    • DC3
    final completed
    This dataset links to supplemental information for the project.
    • PACS
    final completed
    This data set contains HPC imagery from the NAME Field Catalog. The following imagery products are included: day2 QPF.
    • NAME
    final 1.0
    2008-10-07
    Airborne hyperspectral data acquired using HySpex sensors (VNIR-1800 and SWIR-384; HySpex, Skedsmokorset, Norway) for the Chequamegon Heterogeneous Ecosystem Energy-balance Study Enabled by a High-density Extensive Array of Detectors (CHEESEHEAD) Field...
    • CHEESEHEAD
    final 1.0
    2020-05-01
    This dataset contains images from the HYVIS (hydrometeor videosonde) snow crystal camera collected at the North Redfield, New York site from 7 December 2013 through 27 January 2014 as part of the Ontario Winter Lake-effect Systems (OWLeS) project. The...
    • OWLeS
    final 1.0
    2014-07-11
    This dataset contains International Biological Program (IBP) topographic grid point data from the Barrow sites. The data is available as a zip file.
    • ITEX
    1.0
    2007-11-02
    This dataset contains data collected on land cover from Webber's International Biological Program (IBP) microtopographic grid collected in 1973, 2000, and 2001 at Barrow, Alaska for the ITEX project.
    • ITEX
    1.0
    2007-11-02
    This dataset contains data collected on non vascular plant species and land cover abundance from Webber's International Biological Program (IBP) microtopographic grid collected in 1999 at Barrow, Alaska for the ITEX project.
    • ITEX
    1.0
    2007-11-02
    This dataset contains the 2000 photo (in JPG format) of the International Biological Program (IBP) microtopographic grid located in Barrow, Alaska for the ITEX project.
    • ITEX
    1.0
    2007-11-02
    This dataset contains the 1973 photo (in TIF format) of the International Biological Program (IBP) microtopographic grid located in Barrow, Alaska for the ITEX project.
    • ITEX
    1.0
    2007-11-02
    This dataset contains point data on land cover from Webber's International Biological Program (IBP) microtopographic grid collected in 1973, 1999, 2000, and 2001 at Barrow, Alaska for the ITEX project.
    • ITEX
    1.0
    2007-11-02
    This dataset contains data collected on plant species data from Webber's International Biological Program (IBP) microtopographic grid collected in 1973 and 1999 at Barrow, Alaska for the ITEX project.
    • ITEX
    1.0
    2007-11-02
    This dataset contains data collected on vascular plant species and land cover abundance from Webber's International Biological Program (IBP) microtopographic grid collected in 1973 at Barrow, Alaska for the ITEX project.
    • ITEX
    1.0
    2007-11-02
    This dataset contains data collected on vascular plant species and land cover abundance from Webber's International Biological Program (IBP) microtopographic grid collected in 1999 at Barrow, Alaska for the ITEX project.
    • ITEX
    1.0
    2007-11-02
    This dataset contains 1971 data collected on species and land cover and abundance from Webber and Ebert-May's former International Biological Program (IBP) plots on Niwot Ridge, Colorado. For more information, please see the readme file.
    • ITEX
    1.0
    2007-11-02
    This dataset contains 1991 data collected on species and land cover and abundance from Webber and Ebert-May's former International Biological Program (IBP) plots on Niwot Ridge, Colorado. For more information, please see the readme file.
    • ITEX
    1.0
    2007-11-02
    This dataset contains 2001 data collected on species and land cover and abundance from Webber and Ebert-May's former International Biological Program (IBP) plots on Niwot Ridge, Colorado. For more information, please see the readme file.
    • ITEX
    1.0
    2007-11-02
    This database contains 64 photographs of International Biological Program (IBP) plots on Niwot Ridge, Colorado. For more information, please see the readme file.
    • ITEX
    1.0
    2009-01-27
    This dataset contains Research on Arctic Tundra Environments (RATE) plot resampling photos collected in 2000 at Barrow, Alaska for the ITEX project.
    • ITEX
    1.0
    2007-11-02
    This dataset contains 1971 to 2001 data collected on species and land cover and abundance from Webber and Ebert-May's former International Biological Program (IBP) plots on Niwot Ridge, Colorado. For more information, please see the readme file.
    • ITEX
    1.0
    2007-11-02
    The dataset contains quantitative information on the occurrence of algae in sea ice (bottom 0-2cm segment of ice cores), in the water column (5m depth) and the vertical flux as determined in sediment trap samples (deployed in 5m water depth below sea...
    • BEST
    final 1.0
    2015-02-13
    This data set contains PRELIMINARY data from channel-1 of the ARM Atmospheric Emitted Radiance Interferometer (AERI). Data are GIF images of temperature plots from selected days.
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains PRELIMINARY data from channel-2 of the ARM Atmospheric Emitted Radiance Interferometer (AERI). Data are GIF images of temperature plots from selected days.
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains PRELIMINARY data from the ARM Atmospheric Emitted Radiance Interferometer (AERI). Data are GIF images of temperature plots from selected days.
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains PRELIMINARY data from conductivity, temperature and depth (CTD) casts taken at the Ice Station. Parameters include pressure, temperature, conductivity and salinity. Data are ASCII text of CTD casts from selected days.
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains data from a PRELIMINARY analysis of every 10th downcast of the yoyo Conductivity Temperature Depth (CTD) between the start of SHEBA and the end of January 1998. It is made from Tim Stanton's field summary data analysis. These are...
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains data from a PRELIMINARY analysis of every 10th downcast of the yoyo Conductivity Temperature Depth (CTD) between the start of SHEBA and the end of January 1998. It is made from Tim Stanton's field summary data analysis. These are...
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains data from a PRELIMINARY analysis of every 10th downcast of the yoyo Conductivity Temperature Depth (CTD) between the start of SHEBA and the end of January 1998. It is made from Tim Stanton's field summary data analysis. These are...
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains data from a PRELIMINARY analysis of every 10th downcast of the yoyo Conductivity Temperature Depth (CTD) between the start of SHEBA and the end of January 1998. It is made from Tim Stanton's field summary data analysis. These are...
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains data from a PRELIMINARY analysis of every 10th downcast of the yoyo Conductivity Temperature Depth (CTD) between the start of SHEBA and the end of January 1998. It is made from Tim Stanton's field summary data analysis. These are...
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains PRELIMINARY data from conductivity, temperature and depth (CTD) casts taken at the Ice Station. Parameters include pressure, temperature, conductivity and salinity and may be multiple ascents and/or descents (yoyo) casts. Data...
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains the six hourly record of GPS position and heading from the Ice Station. Data are retrieved from the ARM GPS system and should be considered PRELIMINARY. Period covered from 10/17/97 through the present. The record is updated weekly.
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains PRELIMINARY ice core temperature cross-section data from CRREL ice thermistor chains at Pittsburgh site. Measurements are made hourly from each site on throughout the deployment. Data are ASCII text of ice temperature in degrees...
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains PRELIMINARY ice core temperature cross-section data from CRREL ice thermistor chains at Baltimore site. Measurements are made hourly from each site on throughout the deployment. Data are ASCII text of ice temperature in degrees...
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains PRELIMINARY ice core temperature cross-section data from CRREL ice thermistor chains at Seattle site. Measurements are made hourly from each site on throughout the deployment. Data are ASCII text of ice temperature in degrees...
    • SHEBA
    preliminary 1.0
    2007-11-02
    This data set contains PRELIMINARY ice thickness data from CRREL ice thicknes gages at Baltimore, Pittsburgh and Seattle sites. Measurements are made from multiple gages at each site on selected days throughout the deployment. Data are ASCII text of...
    • SHEBA
    preliminary 1.0
    2007-11-02
    Hourly record of GPS drift velocities and position from the Ice Station. Data are smoothed through a complex filter. Period covered from 10/14/1997 through 09/25/1998 with a few gaps.
    • SHEBA
    preliminary 1.0
    2007-11-02
    A preliminary analysis has been done by Chris Fairall using longwave radiometer data from the SHEBA project office and the flux group (P. Guest). This analysis which contains an ASCII data file and 3 GIF figures as well as some description of the...
    • SHEBA
    preliminary

    © 2025 UCAR | EOL | Privacy | Email: datahelp@eol.ucar.edu

    NSF

    This material is based upon work supported by the NSF National Center for Atmospheric Research, a major facility sponsored by the U.S. National Science Foundation and managed by the University Corporation for Atmospheric Research. Any opinions, findings and conclusions or recommendations expressed in this material do not necessarily reflect the views of the U.S. National Science Foundation.