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

Dataset List

    14642 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 contains VHS format video tapes recorded from a downward-looking video camera system mounted on the ER-2 during CEPEX. One video tape has been recorded per mission, for a total of 15 tapes in the archive. F-stop varied per mission with...
    • CEPEX
    This dataset contains processed Japanese GMS-4 geostationary satellite imagery collected by the SeaSpace Terascan system in Nandi, Fiji, during CEPEX. The images have been post processed using Terascan software and converted to NetCDF. The post...
    • CEPEX
    This dataset contains 35mm slide cloud photography taken from a hand-held SLR camera system on the Aeromet Inc. Lear Jet during CEPEX. The camera system was a Minolta X-700 35 mm camera with Minolta multi-function back date/time stamp. All slides were...
    • CEPEX
    This dataset contains digital radar data from the MIT radar aboard the Research Vessel Vickers during the CEPEX experiment. These data are the original, raw radar reflectivities and radial velocities recorded by this 5 centimeter doppler radar....
    • CEPEX
    This dataset contains VHS format video tapes recorded from a forward-looking video camera system mounted on the P-3 during CEPEX. The portable camera recorded the video on 8mm master tapes, which were later copied to Video Home System (VHS) format....
    • CEPEX
    This dataset contains 35mm slide cloud photography taken from a hand-held SLR camera system on the R/V Vickers during CEPEX. Slides were routinely taken hourly (during daylight hours only) at 4 cardinal positions plus overhead. All slides were...
    • CEPEX
    This dataset contains a Community Earth System Model (CESM) forecast movie with lat/lon for the O2/N2 Ratio and CO2 Airborne Southern Ocean (ORCAS) campaign.
    • ORCAS
    final 1.0
    2017-05-03
    This dataset contains a Community Earth System Model (CESM) forecast movie with lat/lon/alt for the O2/N2 Ratio and CO2 Airborne Southern Ocean (ORCAS) campaign.
    • ORCAS
    final 1.0
    2017-05-03
    This dataset contains post-processed data from a METEK vertically profiling K-band Micro Rain Radar (MRR-2) installed at the climate sentinel in the Arboretum forest reserve (ARBO), about 30 km west of Montréal downtown, Québec, Canada. The data were...
    • WINTRE-MIX
    final 1.0
    2022-09-20
    This dataset contains raw data from a METEK vertically profiling K-band Micro Rain Radar (MRR-2) installed at the climate sentinel in the Arboretum forest reserve (ARBO), about 30 km west of Montréal downtown, Québec, Canada. The data were collected as...
    • WINTRE-MIX
    final 1.0
    2022-09-20
    This dataset contains raw data collected from an OTT Parsivel laser disdrometer installed at a climate sentinel (Arboretum) in the Saint Lawrence River Valley. The data is available from 1 Nov 2021 to 31 March 2022 (inclusive) to support the Winter...
    • WINTRE-MIX
    final 1.0
    2022-09-21
    This dataset contains post-processed data from a METEK vertically profiling K-band Micro Rain Radar (MRR-2) installed at the climate sentinel in the Gault Nature Reserve (GAUL), about 30 km east of Montréal, Québec. The data were collected as part of...
    • WINTRE-MIX
    final 1.0
    2022-09-21
    This dataset contains raw data from a METEK vertically profiling K-band Micro Rain Radar (MRR-2) installed at the climate sentinel in the Gault Nature Reserve (GAUL), about 30 km east of Montréal, Québec.The data were collected as part of the Winter...
    • WINTRE-MIX
    final 1.0
    2022-09-21
    This dataset contains raw data collected from an OTT Parsivel laser disdrometer installed at a climate sentinel (Gault) in the Saint Lawrence River Valley The data is available from 1 Nov 2021 to 31 March 2022 (inclusive) to support the Winter...
    • WINTRE-MIX
    final 1.0
    2022-09-21
    This dataset includes hotplate precipitation gauge data from 4 different sites sitting in the St. Lawrence River Valley. The hotplate data were obtained by the K63 Hotplate Total Precipitation Gauge. The instruments belonged to Université du Québec à...
    • WINTRE-MIX
    final 1.0
    2022-09-14
    This dataset contains ice thickness data collected by ice detectors installed at various climate sentinels within the Saint Lawrence River Valley for the WINTRE-MIX field project. The names of four stations for which ice accretion data are available in...
    • WINTRE-MIX
    final 1.0
    2022-09-16
    The Sentinel Non-Radiation MetData provided in situ measurements of meteorological variables (such as 2-meter temperature, relative humidity, wind speed and direction, and precipitation) collected for the the Winter Precip Type Research Multi-scale...
    • WINTRE-MIX
    final 1.0
    2022-09-13
    The Sentinel Radiation MetData provided in situ measurements of radiation fluxes for the Winter Precip Type Research Multi-scale Experiment (WINTRE-MIX) are included in this dataset. Pyranometer and radiation data are provided in netCDF format.  Data...
    • WINTRE-MIX
    final 1.0
    2022-09-15
    This dataset includes snow depth and snow water equivalent data from 4 sites in the St. Lawrence River Valley collected for the WINTRE-MIX field project. The snow depth data were obtained by the SDMS40: Multipoint Scanning Snowfall Sensor and the SR50A...
    • WINTRE-MIX
    final 1.0
    2022-09-16
    This dataset contains data from a METEK vertically profiling K-band Micro Rain Radar Pro (MRR-Pro) that was temporarily installed at the Université du Québec à Trois-Rivières (UQTR) campus during February and March 2022 to support the Winter...
    • WINTRE-MIX
    final 1.0
    2022-07-05
    This dataset contains processed data from a METEK vertically profiling K-band Micro Rain Radar (MRR-2) permanently installed on the rooftop of UQAM President-Kennedy building in Montréal downtown, Québec. The instrument provides vertical profiles of...
    • WINTRE-MIX
    final 1.0
    2022-06-24
    This dataset contains raw data from a METEK vertically profiling K-band Micro Rain Radar (MRR-2) permanently installed on the rooftop of UQAM President-Kennedy building in Montréal downtown, Québec. The instrument provides vertical profiles of...
    • WINTRE-MIX
    final 1.0
    2022-06-23
    This dataset contains raw data from an OTT Parsivel laser disdrometer permanently installed on the rooftop of UQAM President-Kennedy building in Montréal downtown, Québec. The instrument provides histograms of hydrometeor size and fallspeed. The site...
    • WINTRE-MIX
    final 1.0
    2022-08-31
    This dataset contains dissolved organic carbon (DOC) measurements acquired by processing water samples gathered from the eastern Beaufort Sea and Amundsen Gulf. Samples were collected during the Circumpolar Flaw Lead (CFL) Program aboard the Amundsen...
    • ACADIS
    • ARCSS
    1.0
    2012-03-16
    A link to the NOAA/NCEP Climate Forecast System (CFS) website.
    • AMMA
    final completed
    This dataset provides a link to the DYNAMO Field Catalog Model Products section which includes imagery from the NCEP CFS model during the campaign.
    • DYNAMO
    final completed
    These data represent the results from the passive acoustic monitoring using sonobuoys that occurred during the 2010 Chukchi Acoustics, Oceanography, and Zooplankton (CHAOZ) study. TImes are reported in Alaska Daylight Time (AKDT, UTC -8). Each row...
    • DBO
    final 1.0
    2015-08-03
    These data represent results from the 2010-11 Chukchi Acoustics, Oceanography, and Zooplankton (CHAOZ) passive acoustic deployment of the inshore Icy Cape mooring, CZ10_AU_A03. Data are presented as a percentage of time intervals per day with calls for...
    • DBO
    final 1.0
    2015-09-09
    These data represent results from the 2010-11 Chukchi Acoustics, Oceanography, and Zooplankton (CHAOZ) passive acoustic deployment of the midshore Icy Cape mooring, CZ10_AU_B03. Data are presented as a percentage of time intervals per day with calls...
    • DBO
    final 1.0
    2015-09-09
    These data represent results from the 2010-11 Chukchi Acoustics, Oceanography, and Zooplankton (CHAOZ) passive acoustic deployment of the offshore Icy Cape mooring, CZ10_AU_C02. Data are presented as a percentage of time intervals per day with calls...
    • DBO
    final 1.0
    2015-09-09
    These data represent results from the 2011-12 Chukchi Acoustics, Oceanography, and Zooplankton (CHAOZ) passive acoustic deployment of the inshore Icy Cape mooring, CZ11_AU_A03. Data are presented as a percentage of time intervals per day with calls for...
    • DBO
    final 1.0
    2015-09-09
    These data represent results from the 2011-12 Chukchi Acoustics, Oceanography, and Zooplankton (CHAOZ) passive acoustic deployment of the midshore Icy Cape mooring, CZ11_AU_B03. Data are presented as a percentage of time intervals per day with calls...
    • DBO
    final 1.0
    2015-09-09
    These data represent results from the 2011-12 Chukchi Acoustics, Oceanography, and Zooplankton (CHAOZ) passive acoustic deployment of the offshore Icy Cape mooring, CZ11_AU_C02. Data are presented as a percentage of time intervals per day with calls...
    • DBO
    final 1.0
    2015-09-09
    This data set investigates the characteristics and spatial distribution of a mummified forest deposit in Quttinirpaaq National Park, Canada. Analyses include palynological characterization, tree identification, and leaf identification. Preliminary...
    • ACADIS
    • ARCSS
    1.0
    2011-11-07
    Flight Chat Logs for the ACCLIP (Asian Summer Monsoon Chemical and CLimate Impact Project) field project, collected from 25 July to 01 September 2022 onboard the GV (Gulfstream V). These data are available in a txt format.
    • ACCLIP
    final 1.0
    2022-10-14
    Flight Chat Logs for the ASPIRE-TEST field project, collected onboard the GV (Gulfstream V). These data are available in a txt format upon request.
    • ASPIRE-TEST
    final
    Flight Chat Logs for the ECLIPSE2019 field project, collected onboard the NSF/NCAR HIAPER GV (Gulfstream V). These data are available in a txt format upon request.
    • ECLIPSE2019
    final
    Flight Chat Logs for the ARISTO2017 field project, collected onboard the NSF/NCAR HIAPER GV (Gulfstream V). These data are available in a txt format upon request.
    • ARISTO2017
    final 1.0
    2025-02-27
    Flight Chat Logs for the Airborne Research Instrumentation Testing Opportunity 2016 (ARISTO2016) field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • ARISTO2016
    final
    Flight Chat Logs for the HIPPO field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • HIPPO
    final 1.0
    2025-07-02
    Flight Chat Logs for the HIPPO-2 field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • HIPPO2
    final 1.0
    2025-07-02
    Flight Chat Logs for the ARISTO field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • ARISTO
    final 1.0
    2025-07-02
    Flight Chat Logs for the MITTS field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • MITTS
    final 1.0
    2025-07-02
    Flight Chat Logs for the WAMO field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • WAMO
    final 1.0
    2025-07-02
    Flight Chat Logs for the SOCRATES-TEST field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • SOCRATES-TEST
    final 1.0
    2025-07-02
    Flight Chat Logs for the IDEAS4-GV field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • IDEAS-4_GV
    final 1.0
    2025-07-02
    Flight Chat Logs for the PREDICT field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • PREDICT
    final 1.0
    2025-07-02
    Flight Chat Logs for the HIPPO-3 field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • HIPPO3
    final 1.0
    2025-07-02
    Flight Chat Logs for the ICEBRIDGE field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • ICEBRIDGE
    final 1.0
    2025-07-02
    Flight Chat Logs for the ICEBRIDGE2015 field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • ICEBRIDGE-2015
    final 1.0
    2025-07-02
    Flight Chat Logs for the HCR-TEST field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • HCR-Test
    final 1.0
    2025-07-02
    Flight Chat Logs for the SABIRPOD field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • SABIRPOD
    final 1.0
    2025-07-02
    Flight Chat Logs for the SPRITES-II field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • SPRITES-II
    final 1.0
    2025-07-02
    Flight Chat Logs for the NOREASTER field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • NOREASTER
    final 1.0
    2025-07-02
    Flight Chat Logs for the HIPPO-4 field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • HIPPO4
    final 1.0
    2025-07-02
    Flight Chat Logs for the HIPPO-5 field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • HIPPO5
    final 1.0
    2025-07-02
    Flight Chat Logs for the ADELE field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • ADELE-SPRITE
    final 1.0
    2025-07-02
    Flight Chat Logs for the PASE field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • PASE
    final 1.0
    2025-07-02
    Flight Chat Logs for the FRAPPE field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • FRAPPE
    final 1.0
    2025-07-07
    Flight Chat Logs for the PLOWS field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • PLOWS
    final 1.0
    2025-07-07
    Flight Chat Logs for the VOCALS field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • VOCALS
    final 1.0
    2025-07-07
    Flight Chat Logs for the PACDEX field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These data are available in a txt format upon request.
    • PACDEX
    final 1.0
    2025-07-07
    Flight Chat Logs for the MILAGRO field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • MILAGRO
    final 1.0
    2025-07-07
    Flight Chat Logs for the IDEAS4-C130 field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • IDEAS-4_C130
    final 1.0
    2025-07-07
    Flight Chat Logs for the MIRAGE field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • MIRAGE_Mexico
    final 1.0
    2025-07-07
    Flight Chat Logs for the INTEX-B2 field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These data are available in a txt format upon request.
    • INTEX-B2
    final 1.0
    2025-07-07
    This dataset contains the scrubbed chat logs for the ACME field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These chat logs contain conversations between scientists and other project participants collected during the field phase...
    • ACME
    final 1.0
    2025-07-07
    This dataset contains the scrubbed chat logs for the AIRS-II field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These chat logs contain conversations between scientists and other project participants collected during the field...
    • AIRS-II
    final 1.0
    2025-07-07
    This dataset contains the scrubbed chat logs for the GOTEX field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These chat logs contain conversations between scientists and other project participants collected during the field...
    • GOTEX
    final 1.0
    2025-07-07
    This dataset contains the scrubbed chat logs for the IDEAS-3 field project, collected onboard the NSF/NCAR C-130 (Tail Number N130AR). These chat logs contain conversations between scientists and other project participants collected during the field...
    • IDEAS-3
    final 1.0
    2025-07-07
    This dataset contains the scrubbed chat logs for the CGWaveS field project, collected onboard the NSF/NCAR HIAPER GV (Tail Number N677F). These chat logs contain conversations between scientists and other project participants collected during the field...
    • CG_WaveS
    final 1.0
    2025-07-07
    This dataset contains Chat Room Log files, hereafter referred to as "Chat," generated during the RAINEX field project. Chat represents the latest in technology for the operations of Field Projects. Project RAINEX Chat is developed and managed by the...
    • RAINEX
    final 1.0
    2008-10-07
    This dataset contains chat logs and flight notes from the NASA DC-8 aircraft from the High Ice Water Content 2022 (HIWC 2022) project that was based in Jacksonville, Florida. There are also chat logs and flight notes from the NASA DC-8 aircraft from...
    • HIWC_2022
    final 1.0
    2024-02-05
    These files contain the chat logs during flights for the Stratosphere-Troposphere Analyses of Regional Transport (START08) project.
    • START08
    final 1.0
    2008-07-28
    SkewT/logP plot of the Global Telecommunications System (GTS) upper air data collected during the ACE-1 Intensive Operations in Hobart, Tasmania, via the Australian Bureau of Meteorology(BoM) McIDAS-X system, then converted to GIF image format. These...
    • ACE-1
    final 1.0
    1996-02-01
    This dataset provides a link to the Chequamegon Ecosystem-Atmosphere Study (ChEAS ) and Desai lab Flux Data website.
    • CHEESEHEAD
    final completed
    CHEESEHEAD 2019 project documentation is included in this dataset and it includes: * Experimental design, proposal narrative, airborne operations summary, data variable summary, main data sources, teleconference notes, instrumentation table; *...
    • CHEESEHEAD
    final 1.0
    2021-01-11
    This dataset provides a link to a Google Drive containing field notes from the CHEESEHEAD campaign.
    • CHEESEHEAD
    final completed
    A link to a collection of photographs from the CHEESEHEAD campain. Includes photos of instrumentation, operations and project participants.
    • CHEESEHEAD
    final completed
    This dataset provides a link to telecon notes from the CHEESEHEAD campaign.
    • CHEESEHEAD
    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 Chemical and Isotopic Tracers from the Arctic Ocean. These data are water column and sediment data tabulated in Microsoft Excel spreadsheets. They were largely collected in the Bering and Chukchi Seas, with some coverage for the...
    • ARCSS
    1.0
    2011-09-14
    This dataset provides a link to the CEDA Archive CAST campaign datasets.
    • CONTRAST
    final completed
    This dataset provides a link to the DC-3 Field Catalog Reports section which includes Chemical Models Discussion Reports
    • DC3
    final completed
    These Chemical Tracer Measurements are part of the BACS (BioAerosol and Convective Storm) campaign. The purpose of the BACS campaign was to characterize the dynamics between convective storms and bioaerosols in a grassland environment. The focus of PI...
    • BACS
    final 1.0
    2025-05-20
    This data set contains NSF/NCAR C-130 Chemiluminescence Instrument for NO, NO2, and O3 Data collected during the WE-CAN (Western Wildfire Experiment for Cloud Chemistry, Aerosol, Absorption and Nitrogen) field project from 24 July through 13 September ...
    • WE-CAN
    final 1.0
    2019-03-20
    Measurements of NO, NO2, and O3 obtained by the 2-channel (NO/NO2) and the fast O3 chemiluminescence instruments onboard the NSF/NCAR GV aircraft during the ACCLIP campaign in August 2022.
    • ACCLIP
    final 1.0
    2023-04-04
    This dataset contains a set of Fast (25Hz) text format data files of 10 second sulfur dioxide (SO2) concentration data for the Pacific Atmospheric Sulfur Experiment (PASE). The data files are ascii format. In addition, pdf notebook files for each...
    • PASE
    final 1.0
    2011-09-14
    This dataset contains Fast (25 Hz) and decimated 10 second dimethylsulfide (DMS) data for the Pacific Atmospheric Sulfur Experiment (PASE), collected on the NCAR C-130 in Aug-Sept, 2007 from Kiritimati (Christmas) Island, Republic of Kiribati. The data...
    • PASE
    final 1.0
    2011-09-14
    Data are from the Pacific Atmospheric Sulfur Experiment (PASE) and were collected on the NCAR C-130 in August-Sept. 2007 from Kiribati (Christmas) Island, Republic of Kiribati. High rate data files (PASExfxxh.chm.txt) contain only chemiluminescence...
    • PASE
    final 1.0
    2011-09-14
    This dataset provides a link to the TORERO Field Catalog Reports section which includes Chemistry Forecast Discussion Reports from the campaign.
    • TORERO
    final completed
    Hydrogen peroxide (H2O2) and methylhydroperoxide (CH3OOH) data from the Pacific Atmospheric Sulfur Experiment (PASE) was collected on the NCAR C-130 in August-Sept, 2007 from Kiribate (Christmas) Island, Republic of Kiribati. Data for each flight is...
    • PASE
    final 1.0
    2011-09-14
    Hydrogen Peroxide concentrations are determined by chemiluminescence due to oxidation of acridinium ester. Data is from the Pacific Atmospheric Sulfur Experiment (PASE) and were collected on the NCAR C-130 in August-Sept. 2007 from Kiribate (Christmas)...
    • PASE
    final 1.0
    2011-09-14
    This data was collected from the NCAR/NSF C-130 during the PASE program.This dataset is in the form of an Excel spreadsheet that includes the sample name, the UTC date, the UTC start and stop times, GPS altitude, correctee concentrations of the ions in...
    • PASE
    final 1.0
    2011-09-14
    This dataset contains ozone measurements at 1hz collected during the PREDICT project. The data is in columnar ascii format.
    • PREDICT
    final 1.0
    2013-03-01
    Data from the Chicago Water Isotope Spectrometer (ChiWIS) that was flown on the NASA WB-57 aircraft for the ACCLIP deployment. ChiWIS provides measurements of water vapor mixing ratio and deltaD.  The ACCLIP flights were based out of Osan Air Base in...
    • ACCLIP
    final
    This dataset includes the abundance, biomass, and energetic content of zooplankton in chick meals taken from the gular pouch of provisioning adult little auks in Hornsund Fjord, southwest Spitsbergen in July 2001-2008. Data is contained in a single...
    • ACADIS
    • ARCSS
    1.0
    2012-03-19
    This dataset includes Weight-at-Age for little auk chicks in Hornsund Fjord, southwest Spitsbergen during the breeding season (July-August) in 2001 and 2005-2008. Data are included in a single Excel file.
    • ACADIS
    • ARCSS
    1.0
    2012-03-19
    This dataset links to supplemental information for the project.
    • VOCALS
    final completed

    © 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.