Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan

Chung Ru Ho; Po Chun Hsu; Chen Chih Lin; Shih Jen Huang

doi:10.1117/12.2277693

Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan

Chung Ru Ho, Po Chun Hsu, Chen Chih Lin, Shih Jen Huang

Center for Space and Remote Sensing Research

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

Changes of oceanic salinity are highly related to the variations of evaporation and precipitation. To understand the influence of rainfall on the sea surface salinity (SSS) in the waters adjacent to Taiwan, satellite remote sensing data from the year of 2012 to 2014 are employed in this study. The daily rain rate data obtained from Special Sensor Microwave Imager (SSM/I), Tropical Rainfall Measuring Mission's Microwave Imager (TRMM/TMI), Advanced Microwave Scanning Radiometer (AMSR), and WindSat Polarimetric Radiometer. The SSS data was derived from the measurements of radiometer instruments onboard the Aquarius satellite. The results show the average values of SSS in east of Taiwan, east of Luzon and South China Sea are 33.83 psu, 34.05 psu, and 32.84 psu, respectively, in the condition of daily rain rate higher than 1 mm/hr. In contrast to the rainfall condition, the average values of SSS are 34.07 psu, 34.26 psu, and 33.09 psu in the three areas, respectively at no rain condition (rain rate less than 1 mm/hr). During the cases of heavy rainfall caused by spiral rain bands of typhoon, the SSS is diluted with an average value of -0.78 psu when the average rain rate is higher than 4 mm/hr. However, the SSS was increased after temporarily decreased during the typhoon cases. A possible reason to explain this phenomenon is that the heavy rainfall caused by the spiral rain bands of typhoon may dilute the sea surface water, but the strong winds can uplift the higher salinity of subsurface water to the sea surface.

Original language	English
Title of host publication	Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017
Editors	Charles R. Bostater, Xavier Neyt, Stelios P. Mertikas, Sergey Babichenko
Publisher	SPIE
ISBN (Electronic)	9781510613089
DOIs	https://doi.org/10.1117/12.2277693
State	Published - 2017
Event	Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017 - Warsaw, Poland Duration: 11 Sep 2017 → 12 Sep 2017

Publication series

Name	Proceedings of SPIE - The International Society for Optical Engineering
Volume	10422
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017
Country/Territory	Poland
City	Warsaw
Period	11/09/17 → 12/09/17

Keywords

Aquarius satellite
Rainfall
Sea surface salinity
Water cycle

Access to Document

10.1117/12.2277693

Cite this

Ho, C. R., Hsu, P. C., Lin, C. C., & Huang, S. J. (2017). Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan. In C. R. Bostater, X. Neyt, S. P. Mertikas, & S. Babichenko (Eds.), Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017 [104220Z] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10422). SPIE. https://doi.org/10.1117/12.2277693

Ho, Chung Ru ; Hsu, Po Chun ; Lin, Chen Chih et al. / Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan. Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017. editor / Charles R. Bostater ; Xavier Neyt ; Stelios P. Mertikas ; Sergey Babichenko. SPIE, 2017. (Proceedings of SPIE - The International Society for Optical Engineering).

@inproceedings{b7a2ab920e8c4565a7a6c9c2f3212a9e,

title = "Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan",

abstract = "Changes of oceanic salinity are highly related to the variations of evaporation and precipitation. To understand the influence of rainfall on the sea surface salinity (SSS) in the waters adjacent to Taiwan, satellite remote sensing data from the year of 2012 to 2014 are employed in this study. The daily rain rate data obtained from Special Sensor Microwave Imager (SSM/I), Tropical Rainfall Measuring Mission's Microwave Imager (TRMM/TMI), Advanced Microwave Scanning Radiometer (AMSR), and WindSat Polarimetric Radiometer. The SSS data was derived from the measurements of radiometer instruments onboard the Aquarius satellite. The results show the average values of SSS in east of Taiwan, east of Luzon and South China Sea are 33.83 psu, 34.05 psu, and 32.84 psu, respectively, in the condition of daily rain rate higher than 1 mm/hr. In contrast to the rainfall condition, the average values of SSS are 34.07 psu, 34.26 psu, and 33.09 psu in the three areas, respectively at no rain condition (rain rate less than 1 mm/hr). During the cases of heavy rainfall caused by spiral rain bands of typhoon, the SSS is diluted with an average value of -0.78 psu when the average rain rate is higher than 4 mm/hr. However, the SSS was increased after temporarily decreased during the typhoon cases. A possible reason to explain this phenomenon is that the heavy rainfall caused by the spiral rain bands of typhoon may dilute the sea surface water, but the strong winds can uplift the higher salinity of subsurface water to the sea surface.",

keywords = "Aquarius satellite, Rainfall, Sea surface salinity, Water cycle",

author = "Ho, {Chung Ru} and Hsu, {Po Chun} and Lin, {Chen Chih} and Huang, {Shih Jen}",

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Ho, CR, Hsu, PC, Lin, CC & Huang, SJ 2017, Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan. in CR Bostater, X Neyt, SP Mertikas & S Babichenko (eds), Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017., 104220Z, Proceedings of SPIE - The International Society for Optical Engineering, vol. 10422, SPIE, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017, Warsaw, Poland, 11/09/17. https://doi.org/10.1117/12.2277693

Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan. / Ho, Chung Ru; Hsu, Po Chun; Lin, Chen Chih et al.

Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017. ed. / Charles R. Bostater; Xavier Neyt; Stelios P. Mertikas; Sergey Babichenko. SPIE, 2017. 104220Z (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 10422).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan

AU - Ho, Chung Ru

AU - Hsu, Po Chun

AU - Lin, Chen Chih

AU - Huang, Shih Jen

PY - 2017

Y1 - 2017

N2 - Changes of oceanic salinity are highly related to the variations of evaporation and precipitation. To understand the influence of rainfall on the sea surface salinity (SSS) in the waters adjacent to Taiwan, satellite remote sensing data from the year of 2012 to 2014 are employed in this study. The daily rain rate data obtained from Special Sensor Microwave Imager (SSM/I), Tropical Rainfall Measuring Mission's Microwave Imager (TRMM/TMI), Advanced Microwave Scanning Radiometer (AMSR), and WindSat Polarimetric Radiometer. The SSS data was derived from the measurements of radiometer instruments onboard the Aquarius satellite. The results show the average values of SSS in east of Taiwan, east of Luzon and South China Sea are 33.83 psu, 34.05 psu, and 32.84 psu, respectively, in the condition of daily rain rate higher than 1 mm/hr. In contrast to the rainfall condition, the average values of SSS are 34.07 psu, 34.26 psu, and 33.09 psu in the three areas, respectively at no rain condition (rain rate less than 1 mm/hr). During the cases of heavy rainfall caused by spiral rain bands of typhoon, the SSS is diluted with an average value of -0.78 psu when the average rain rate is higher than 4 mm/hr. However, the SSS was increased after temporarily decreased during the typhoon cases. A possible reason to explain this phenomenon is that the heavy rainfall caused by the spiral rain bands of typhoon may dilute the sea surface water, but the strong winds can uplift the higher salinity of subsurface water to the sea surface.

AB - Changes of oceanic salinity are highly related to the variations of evaporation and precipitation. To understand the influence of rainfall on the sea surface salinity (SSS) in the waters adjacent to Taiwan, satellite remote sensing data from the year of 2012 to 2014 are employed in this study. The daily rain rate data obtained from Special Sensor Microwave Imager (SSM/I), Tropical Rainfall Measuring Mission's Microwave Imager (TRMM/TMI), Advanced Microwave Scanning Radiometer (AMSR), and WindSat Polarimetric Radiometer. The SSS data was derived from the measurements of radiometer instruments onboard the Aquarius satellite. The results show the average values of SSS in east of Taiwan, east of Luzon and South China Sea are 33.83 psu, 34.05 psu, and 32.84 psu, respectively, in the condition of daily rain rate higher than 1 mm/hr. In contrast to the rainfall condition, the average values of SSS are 34.07 psu, 34.26 psu, and 33.09 psu in the three areas, respectively at no rain condition (rain rate less than 1 mm/hr). During the cases of heavy rainfall caused by spiral rain bands of typhoon, the SSS is diluted with an average value of -0.78 psu when the average rain rate is higher than 4 mm/hr. However, the SSS was increased after temporarily decreased during the typhoon cases. A possible reason to explain this phenomenon is that the heavy rainfall caused by the spiral rain bands of typhoon may dilute the sea surface water, but the strong winds can uplift the higher salinity of subsurface water to the sea surface.

KW - Aquarius satellite

KW - Rainfall

KW - Sea surface salinity

KW - Water cycle

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M3 - 會議論文篇章

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T3 - Proceedings of SPIE - The International Society for Optical Engineering

BT - Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017

A2 - Bostater, Charles R.

A2 - Neyt, Xavier

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PB - SPIE

Y2 - 11 September 2017 through 12 September 2017

ER -

Ho CR, Hsu PC, Lin CC, Huang SJ. Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan. In Bostater CR, Neyt X, Mertikas SP, Babichenko S, editors, Remote Sensing of the Ocean, Sea Ice, Coastal Waters, and Large Water Regions 2017. SPIE. 2017. 104220Z. (Proceedings of SPIE - The International Society for Optical Engineering). doi: 10.1117/12.2277693

Satellite observations of rainfall effect on sea surface salinity in the waters adjacent to Taiwan

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Publication series

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