Comparing SeaWiFS Reprocessing Versions (R3 vs. R4)
Satellite observations of global ocean chlorophyll from SeaWiFS were recently reprocessed to incorporate calibration and algorithm improvements. Here, comparisons are made between the newly reprocessed SeaWiFS Level-3 chlorophyll product and the previous version using in situ measurements. The resul...
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ftnasantrs:oai:casi.ntrs.nasa.gov:20030060619 2023-05-15T13:51:22+02:00 Comparing SeaWiFS Reprocessing Versions (R3 vs. R4) Casey, Nancy W. Gregg, Watson W. Unclassified, Unlimited, Publicly available April 2003 application/pdf http://hdl.handle.net/2060/20030060619 unknown Document ID: 20030060619 http://hdl.handle.net/2060/20030060619 No Copyright CASI Oceanography NASA/TM-2003-212235 Rept-2003-01583-0 NAS 1.15:212235 2003 ftnasantrs 2019-07-21T07:45:59Z Satellite observations of global ocean chlorophyll from SeaWiFS were recently reprocessed to incorporate calibration and algorithm improvements. Here, comparisons are made between the newly reprocessed SeaWiFS Level-3 chlorophyll product and the previous version using in situ measurements. The results show that the newly reprocessed SeaWiFS data matches up better with the surface measurements than the previous version did. Globally, the slope of the match-ups improves to 0.85 from 0.78 in log-log scale. A significant trend that contributed to this improvement was the overall decrease in SeaWiFS chlorophyll levels less than 1.0 mg m(exp -3). Regional analyses reveal that the matchups improve in every oceanic basin, except the Antarctic. However, SeaWiFS continues to exhibit poor correspondence with in situ data in the North Atlantic where the match-ups have a slope of 0.54. Also, an examination of monthly images for May 1999 revealed that the number and magnitude of high-value chlorophyll pixels had increased in the high-latitude open ocean of the South Pacific. Other/Unknown Material Antarc* Antarctic North Atlantic NASA Technical Reports Server (NTRS) Antarctic Pacific The Antarctic |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Oceanography |
spellingShingle |
Oceanography Casey, Nancy W. Gregg, Watson W. Comparing SeaWiFS Reprocessing Versions (R3 vs. R4) |
topic_facet |
Oceanography |
description |
Satellite observations of global ocean chlorophyll from SeaWiFS were recently reprocessed to incorporate calibration and algorithm improvements. Here, comparisons are made between the newly reprocessed SeaWiFS Level-3 chlorophyll product and the previous version using in situ measurements. The results show that the newly reprocessed SeaWiFS data matches up better with the surface measurements than the previous version did. Globally, the slope of the match-ups improves to 0.85 from 0.78 in log-log scale. A significant trend that contributed to this improvement was the overall decrease in SeaWiFS chlorophyll levels less than 1.0 mg m(exp -3). Regional analyses reveal that the matchups improve in every oceanic basin, except the Antarctic. However, SeaWiFS continues to exhibit poor correspondence with in situ data in the North Atlantic where the match-ups have a slope of 0.54. Also, an examination of monthly images for May 1999 revealed that the number and magnitude of high-value chlorophyll pixels had increased in the high-latitude open ocean of the South Pacific. |
format |
Other/Unknown Material |
author |
Casey, Nancy W. Gregg, Watson W. |
author_facet |
Casey, Nancy W. Gregg, Watson W. |
author_sort |
Casey, Nancy W. |
title |
Comparing SeaWiFS Reprocessing Versions (R3 vs. R4) |
title_short |
Comparing SeaWiFS Reprocessing Versions (R3 vs. R4) |
title_full |
Comparing SeaWiFS Reprocessing Versions (R3 vs. R4) |
title_fullStr |
Comparing SeaWiFS Reprocessing Versions (R3 vs. R4) |
title_full_unstemmed |
Comparing SeaWiFS Reprocessing Versions (R3 vs. R4) |
title_sort |
comparing seawifs reprocessing versions (r3 vs. r4) |
publishDate |
2003 |
url |
http://hdl.handle.net/2060/20030060619 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic Pacific The Antarctic |
geographic_facet |
Antarctic Pacific The Antarctic |
genre |
Antarc* Antarctic North Atlantic |
genre_facet |
Antarc* Antarctic North Atlantic |
op_source |
CASI |
op_relation |
Document ID: 20030060619 http://hdl.handle.net/2060/20030060619 |
op_rights |
No Copyright |
_version_ |
1766255199482019840 |