Evaluation of SeaWiFS chlorophyll-a in the Black and Mediterranean seas

Date

2005-05-20

Author

Sancak, S
Besiktepe, ST
Yılmaz, Ayşen
Lee, M
Frouin, R

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

229
views

0
downloads

The performance of NASA's OC2 and OC4 algorithms to estimate chlorophyll-a concentrations from SeaWiFS radiometric measurements on the global scale was tested in two contrasted bio-optical environments, the Black Sea and the Mediterranean Sea. The in situ bio-optical measurements were made during October 1999 at 25 stations. Comparisons of the in situ measurements with the concurrent SeaWiFS retrievals indicate that the OC2 and OC4 algorithms are not working satisfactorily in both seas. Case 2 waters dominate the Black Sea and the failure of the algorithms is expected. On the other hand, failure of the algorithms in the case I waters of the Mediterranean Sea may be due to their specific optical properties. Modifying the OC4 algorithm to include SeaWiFS information at 412 nm yields a better performance in the Mediterranean Sea without degrading performance in the Black Sea. Combining a local algorithm adapted to oligotrophic waters of the Mediterranean Sea and OC4 provides the best results overall.

Subject Keywords

General Earth and Planetary Sciences

URI

https://hdl.handle.net/11511/63316

Journal

INTERNATIONAL JOURNAL OF REMOTE SENSING

DOI

https://doi.org/10.1080/01431160512331337853

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Evaluation of Remotely-Sensed and Model-Based Soil Moisture Products According to Different Soil Type, Vegetation Cover and Climate Regime Using Station-Based Observations over Turkey Bulut, Burak; Yılmaz, Mustafa Tuğrul; Afshar, Mahdı Hesamı ; Sorman, A. Unal; Yücel, İsmail; Cosh, Michael H.; Simsek, Osman (MDPI AG, 2019-08-01) This study evaluates the performance of widely-used remotely sensed- and model-based soil moisture products, including: The Advanced Scatterometer (ASCAT), the Advanced Microwave Scanning Radiometer-Earth Observing System (AMSR-E), the European Space Agency Climate Change Initiative (ESA-CCI), the Antecedent Precipitation Index (API), and the Global Land Data Assimilation System (GLDAS-NOAH). Evaluations are performed between 2008 and 2011 against the calibrated station-based soil moisture observations coll...
Evaluation of GPM-era Global Satellite Precipitation Products over Multiple Complex Terrain Regions Derin, Yagmur; Anagnostou, Emmanouil; Berne, Alexis; Borga, Marco; Boudevillain, Brice; Buytaert, Wouter; Chang, Che-Hao; Chen, Haonan; Delrieu, Guy; Hsu, Yung Chia; Lavado-Casimiro, Waldo; Manz, Bastian; Moges, Semu; Nikolopoulos, Efthymios I.; Sahlu, Dejene; Salerno, Franco; Rodriguez-Sanchez, Juan-Pablo; Vergara, Humberto J.; Yılmaz, Koray Kamil (MDPI AG, 2019-12-02) The great success of the Tropical Rainfall Measuring Mission (TRMM) and its successor Global Precipitation Measurement (GPM) has accelerated the development of global high-resolution satellite-based precipitation products (SPP). However, the quantitative accuracy of SPPs has to be evaluated before using these datasets in water resource applications. This study evaluates the following GPM-era and TRMM-era SPPs based on two years (2014-2015) of reference daily precipitation data from rain gauge networks in te...
Evaluating a mesoscale atmosphere model and a satellite-based algorithm in estimating extreme rainfall events in northwestern Turkey Yücel, İsmail (Copernicus GmbH, 2014-01-01) Quantitative precipitation estimates are obtained with more uncertainty under the influence of changing climate variability and complex topography from numerical weather prediction (NWP) models. On the other hand, hydrologic model simulations depend heavily on the availability of reliable precipitation estimates. Difficulties in estimating precipitation impose an important limitation on the possibility and reliability of hydrologic forecasting and early warning systems. This study examines the performance o...
Testing of Permian - Lower Triassic stratigraphic data in a half-graben/tilt-block system: evidence for the initial rifting phase in Antalya Nappes Sahin, Nazif; Altıner, Demir (Canadian Science Publishing, 2019-11-01) Testing of Middle Permian - Lower Triassic stratigraphic data from the Antalya Nappes in a half-graben/tilt-block system has revealed the presence of episodic rifting events separated by periods of tectonic quiescence. Following a period of uplift during the Permian (Late Artinskian to Roadian), the basement rocks have been activated by displacement faults and several depocenters in half-graben-like asymmetrical basins began to be filled with Roadian to Wordian continental clastic deposits intercalated with...
Assessment of soil acidification due to a natural gas-fired power plant by using two different approaches Soyupak, S; Yurteri, C; Mukhallalati, L; Kilic, B; Kayin, S; Onder, K (Informa UK Limited, 1996-01-01) Potential soil acidification impacts of a proposed natural gas-fired combined cycle power plant were assessed using an integrated approach coupling an atmospheric deposition model with soil acidification quantification. The deposition model was used to estimate the rates of nitrogen oxide (NOx) deposition on the air-soil boundary. The expected changes in the soil column were then predicted by utilizing mechanistic and experimental methods, and the number of years required to reach critical pH values were pr...

Citation Formats

S. Sancak, S. Besiktepe, A. Yılmaz, M. Lee, and R. Frouin, “Evaluation of SeaWiFS chlorophyll-a in the Black and Mediterranean seas,” INTERNATIONAL JOURNAL OF REMOTE SENSING, pp. 2045–2060, 2005, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/63316.