SeaWiFS Views The Galapagos: Islands in the Stream Gene Feldman/NASA GSFC, Laboratory for Hydrospheric Processes, SeaWiFS Project Office ( [email protected] )
Gene Feldman/NASA GSFC, Laboratory for Hydrospheric Processes,
SeaWiFS Project Office ([email protected])
Over the course of less than two weeks, SeaWiFS captured the development of a large plume of plankton-rich water straddling the equator and extending several hundred kilometers downstream from the island of Isabela in the Galapagos Archipelago.
The large phytoplankton bloom to the west of Isabela Island is a consistent feature, constantly changing in size and shape, which sustains an ecosystem like none other. Nowhere else in the world will corals, hammerhead sharks, flightless cormorants, penguins and fur seals be found on the same sub-tidal reef! Cold water from the sub-marine Cromwell current deflects against the Galapagos Platform bringing trace elements, such as iron, into the sunlit coastal waters. This seems to trigger these huge events. To the east, wind-driven upwelling along the equator also encourages production.
Such high primary production also provides for local semi-intensive sea-cucumber, fin-fish, and rock lobster fisheries. The future of the Galapagos Marine Reserve depends on the sustainable management of these resources and improved understanding of the natural environment. In an area also renowned for the devastating impact of large El Niño events, such human impacts might tip the sensitive balance between extinction and survival. The marine scientists of the Charles Darwin Research Station continue using SeaWiFS data as a valuable tool to assess the part such productivity plays in maintaining the unique biodiversity and endemism in the marine reserve.
For more information about the Galapagos and the ongoing work of the CDF please visit <http://www.darwinfoundation.org/>.
The Galapagos: Islands in the Stream
Christa Peters-Lidard, Paul Houser/974 ([email protected])
Sujay Kumar, Yudong Tian/974/GEST
Jim Geiger, Susan Olden, Luther Lighty/580
Objective:A high performance, high resolution (1 km) global land modeling and assimilation system.
Applications:Weather and climate model initialization and retrospective coupled modeling, Flood and water resources forecasting, Precision agriculture, Mobility assessment, etc.
1km MODIS LAI data
a. Performance improvement on single CPU at ¼o resolution
b. Scaling curves for NOAH & CLM at 5km resolution on O3K
< 2 hr
Number of Processors, P
a. ¼o resolution
b. 5km resolution
5 km resolution improvements over ¼o resolution
Status of Advanced Technology Microwave Sounder (ATMS) DevelopmentJames Shiue/NASA GSFC, Laboratory for Hydrospheric Processes, Microwave Sensors Branch ([email protected])
(a) K and Ka bands—March, 2003
(b) V & W bands—May, 2003
* NEΔT, calibration, etc., to meet requirements
Zenith Opacity (dB)
QV, QH : quasi-vertical, quasi-horizontal polarizations
Footprints (km) Development
Chan Dx Dy
1, 2 323.1 141.8
3-16 136.7 60.0
17-22 68.4 30.0
1, 2 74.8 5.2o
3-16 31.6 2.2o
17-22 15.8 1.1o
Beam widthScanning Characteristics
(824 Km orbit, NPP)
Swath = 2503 km
AMSU-(A1+A2) +MHS: Development
P~200 W, M~160 kg, Vol >1 m3The ATMS Challenge