STEP: Stratospheric-Troposphere Exchange Project
Stratospheric-Troposphere Exchange Project (STEP) was a project funded by NASA and NOAA.
From the STEP homepage:
The Stratospheric-Troposphere Exchange Project (STEP) has two objectives:
A. Investigate the mechanism and rates of irreversible transfer of mass, trace gases, and aerosols from troposphere to stratosphere and within the lower stratosphere.
B. Explain the observed extreme dryness of the stratosphere
The first objective derives from the need for a better description of how natural and manmade chemicals move from their tropospheric sources to the stratospheric ozone shield. The second objective, though closely related to the first, deserves separate mention because it has been a fundamental mystery of atmospheric science for decades.
The STEP measurement platforms are the NASA U-2 and ER-2 aircraft.
|Begin Date||1984-04-01 00:00:00|
|End Date||1987-02-28 23:59:59|
Map data from IBCSO, IBCAO, and Global Topography.
Maximum (North) Latitude:
Minimum (South) Latitude:
Minimum (West) Longitude: 130.00, Maximum (East) Longitude: -120.00