The impact of hurricane Nari on the marine environment in the East China Sea

Dongyang Fu; Ning Li

doi:10.1117/12.833148

30 October 2009 The impact of hurricane Nari on the marine environment in the East China Sea

Dongyang Fu, Ning Li

Proceedings Volume 7498, MIPPR 2009: Remote Sensing and GIS Data Processing and Other Applications; 74980Z (2009) https://doi.org/10.1117/12.833148
Event: Sixth International Symposium on Multispectral Image Processing and Pattern Recognition, 2009, Yichang, China

Abstract

Sea surface temperature (SST) and chlorophyll-a concentration (Chl-a) are two typical variables of the ocean environment. This study focus on the area(120-130°E,22-34°N). The SST and Chl-a are monitored using MODIS data. the temperature and salinity are observed in situ from Argo. the change of these variables are simulated by COHERENS. In addition, the Ekman Pumping Velocity(EPV) are calculated. The results are as follows: Firstly, the SST in the study area before NARI was 27.23°C, from 13th to 18th on Sep in 2007 was 25.65°C with the minimum SST of 24.91°C on 14th during NARI. Secondly, the Chl-a before and after NARI was 0.86mg/m3 and 1.23 mg/m³ respectively. On 5th day after hurricane, Chl-a reached to 1.95 mg/m³ . These observations of SST and Chl-a basically kept in consistence with the numerical simulation based on COHERENS in trend. Thirdly, the EPV before NARI was 2×10-5m/s, on the 15th up-to 3.5×10-4 m/s. Finally, the two groups of temperature and salinity data from Argo are on 4th and 14th. The observations showed that SST dropped from 29.95°C to 28.82°C. The average water temperature of 760 meters depth was 19.06°C and 17.85°C on 4th and 14th, respectively. The thermoclines were significantly weakened both in the surface and subsurface layer, the maximum salinity was 34.9psu on 4th near 100 meters and 34.86psu on 14th near the 130 meters depth. The salinity of the halocline decreased because of vertical mixing between the two layers with low-salt.

Citation Download Citation

Dongyang Fu and Ning Li "The impact of hurricane Nari on the marine environment in the East China Sea", Proc. SPIE 7498, MIPPR 2009: Remote Sensing and GIS Data Processing and Other Applications, 74980Z (30 October 2009); https://doi.org/10.1117/12.833148

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