NASA Scientific and Technical Aerospace Reports

20040070941 NASA Goddard Space Flight Center, Greenbelt, MD, USA
Ocean Color and Evidence of Chlorophyll Signature in the TOMS Minimum Reflectivity Data
Ahmad, Z.; Herman, J. R.; Bhartia, P. K.; 2003; 1 pp.; In English; Fall AGU 2003, 8-12 Dec. 2003, San Francisco, CA, USA;
No Copyright; Avail: Other Sources; Abstract Only
Analysis of the TOMS minimum reflectivity data for 380 nm channel (R380) show regions of high reflectivity values
(approx. 7 to 8%) over Sargasso Sea in the Northern Atlantic, anti-cyclonic region in the Southern Atlantic, and a large part
of the ocean in the Southern Pacific, and low values (5 approx. 6 %) over the rest of the open ocean. Through radiative transfer
simulations we show that these features are highly correlated with the distribution of chlorophyll in the ocean. Theoretical
minimum reflectivity values derived with the help of CZCS chlorophyll concentration data as input into a vector
ocean-atmosphere radiative transfer code developed by Ahmad and Fraser show very good agreement with TOMS minimum
reflectivity data for the winter season of year 1980. For the summer season of year 1980, good qualitative agreement is
observed in the equatorial and northern hemisphere but not as good in the southern hemisphere. Also, for cloud-free
conditions, we find a very strong correlation between R340 minus R380 values and the chlorophyll concentration in the ocean.
Results on the possible effects of absorbing and non-absorbing aerosols on the TOMS minimum reflectivity will also be
presented. The results also imply that ocean color will affect the aerosol retrieval over oceans unless corrected.
Author
Total Ozone Mapping Spectrometer; Aerosols; Air Water Interactions; Chlorophylls; Radiative Transfer; Water Color
20040070942 NASA Goddard Space Flight Center, Greenbelt, MD, USA
Implementation of Coupled Skin Temperature Analysis and Bias Correction in a Global Atmospheric Data
Assimilation System
Radakovich, Jon; Bosilovich, M.; Chern, Jiun-dar; daSilva, Arlindo; 2004; 1 pp.; In English; AGU Spring Meeting, 17-21
May 2004, Montreal, Canada; No Copyright; Avail: Other Sources; Abstract Only
The NASA/NCAR Finite Volume GCM (fvGCM) with the NCAR CLM (Community Land Model) version 2.0 was
integrated into the NASA/GMAO Finite Volume Data Assimilation System (fvDAS). A new method was developed for
coupled skin temperature assimilation and bias correction where the analysis increment and bias correction term is passed into
the CLM2 and considered a forcing term in the solution to the energy balance. For our purposes, the fvDAS CLM2 was run
at 1 deg. x 1.25 deg. horizontal resolution with 55 vertical levels. We assimilate the ISCCP-DX (30 km resolution) surface
temperature product. The atmospheric analysis was performed 6-hourly, while the skin temperature analysis was performed
3-hourly. The bias correction term, which was updated at the analysis times, was added to the skin temperature tendency
equation at every timestep. In this presentation, we focus on the validation of the surface energy budget at the in situ reference
sites for the Coordinated Enhanced Observation Period (CEOP). We will concentrate on sites that include independent skin
temperature measurements and complete energy budget observations for the month of July 2001. In addition, MODIS skin
temperature will be used for validation. Several assimilations were conducted and preliminary results will be presented.
Author
Finite Volume Method; Temperature Measurement; MODIS (Radiometry); Imaging Spectrometers; Data Systems; Bias;
Satellite Observation
20040071002 NASA Stennis Space Center, Bay Saint Louis, MS, USA, Lockheed Martin Space Operations, Bay Saint
Louis, MS, USA
The 10-Year Remote Sensing Industry Forecast and Analysis
Rabin, Ron; January 08, 2002; 31 pp.; In English; Presentation at Management Association for Private Photogrammetric
Surveyors (MAPPAS) Winter Meeting 2002, 19-23 Jan. 2002, Cabo San Lucas, Mexico; Original contains black and white
illustrations
Contract(s)/Grant(s): NAS13-650
Report No.(s): SE-2002-01-00002-SSC; No Copyright; Avail: CASI; A03, Hardcopy
This viewgraph presentation provides the results of a survey of 1450 professionals employed by organizations in the
remote sensing industry. The survey asked participants about the status of the industry.
CASI
Remote Sensing; Industries; Technology Assessment; Economic Factors
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