Mr. Qianguang Tu Profile

Qianguang Tu

at Second Institute of Oceanography SOA

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Publications (7)

Proceedings Article | 14 October 2019 Paper

The spatial distribution of salinity in the Pearl River Estuary in China from space

Zengzhou Hao, Qianguang Tu, Haiqing Huang, Difeng Wang, Yan Bai, Zhihua Mao

Proceedings Volume 11150, 1115016 (2019) https://doi.org/10.1117/12.2532373

KEYWORDS: Satellites, Microwave radiation, Radiometry, Absorption, L band, New and emerging technologies, Electromagnetic coupling, Diffusion

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Sea surface salinity of ocean waters has been obtained from L-band microwave radiometer on satellite, such SMOS, Aquarius and SMAP. It provides a new technology and way to observe the salinity over large region from space. However, it is still difficult to get the sea surface salinity of the coastal waters due to that the effect on satellite-observed microwave radiance of radio frequency interference over near-shore regions. Fortunately, the colored dissolved organic matter (CDOM) has conservative or semi-conservative property in the freshwater areas of coastal rivers and it has a good linear correlation between the absorption coefficient of CDOM and salinity. Based on those, a conservative mixing relationship between the fresh water from the Pearl River and the sea water from the South China Sea are established and the distribution of sea surface salinity from MODIS-retrieved absorption coefficient of CDOM (a_CDOM) at 355nm wavelength in this study. The linear relationship between salinity and aCDOM at 355 nm under conservative mixing conditions can be established from the in-situ observed salinity and MODIS-retrieved a_CDOM at 355 nm at the central water mass in the Pearl River Estuary and the northern basin region of South China Sea. By comparing daily observed MODIS-retrieved sea surface salinity with the in-site observed salinity, it shows that the salinity retrieved from satellite-based a_CDOM has good agreement with observations, and it can better capture the location of low salinity fresh water in the Pearl River. For the summer averaged satellite-based salinity from 2002 to 2018, sea surface salinity are gradually increases from the vertical coastline to the sea in the Pearl River Estuary region. The salinity in coastal region is low by the effect of the Pearl River diluted water, and the salinity in offshore region is high. On average, the distribution of salinity shows that the diffusion of fresh water from the Pearl River generally spread along the coastline to the east and west in summer, while the runoff on the westward is larger and on the eastward it is affected by some flushing water of other rivers. In the future, MODIS-retrieved salinity can be as a supplement to salinity inversion of Microwave radiometer in the coastal region.

Proceedings Article | 16 October 2015 Paper

The thermal infrared radiance properties of dust aerosol over ocean

Zengzhou Hao, Delu Pan, Qianguang Tu, Fang Gong, Jianyu Chen

Proceedings Volume 9640, 96400M (2015) https://doi.org/10.1117/12.2195348

KEYWORDS: Aerosols, Infrared radiation, Thermography, Satellites, Clouds, Atmospheric particles, Atmospheric modeling, Water, MODIS, Mid-IR

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Proceedings Article | 14 October 2015 Paper

Observations of SST diurnal variability in the South China Sea

Qianguang Tu, Delu Pan, Zengzhou Hao, Jianyu Chen

Proceedings Volume 9638, 96380O (2015) https://doi.org/10.1117/12.2194476

KEYWORDS: Satellites, Earth observing sensors, Infrared radiation, Microwave radiation, Clouds, MODIS, Radiometry, Error analysis, Contamination, Data acquisition

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Proceedings Article | 24 September 2013 Paper

Quality control of satellite-retrieved sea surface temperature

Qianguang Tu, Delu Pan, Zengzhou Hao, Haiqing Huang, Fang Gong, DongSheng Shi

Proceedings Volume 8871, 88710Q (2013) https://doi.org/10.1117/12.2022704

KEYWORDS: Satellites, MODIS, Infrared radiation, Clouds, Contamination, Radiometry, Infrared imaging, Oceanography, Statistical analysis, Atmospheric modeling

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Proceedings Article | 26 October 2011 Paper

The tropical cyclone intensity estimation based on MODIS data: a case study

Zengzhou Hao, Fang Gong, Qianguang Tu, Delu Pan, Difeng Wang

Proceedings Volume 8177, 81770Z (2011) https://doi.org/10.1117/12.897695

KEYWORDS: Clouds, MODIS, Satellites, Radar, Wind energy, Infrared imaging, Reflectivity, Meteorology, Eye, Temperature metrology

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Proceedings Article | 26 October 2011 Paper

A detection algorithm for Asian dust aerosol over China Seas based on MODIS observations

Zengzhou Hao, Fang Gong, Qianguang Tu, Zhihua Mao

Proceedings Volume 8177, 817714 (2011) https://doi.org/10.1117/12.898017

KEYWORDS: Reflectivity, Aerosols, Clouds, MODIS, Satellites, Detection and tracking algorithms, Ocean optics, Thermography, Atmospheric particles, Earth observing sensors

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Proceedings Article | 13 October 2011 Paper

The impact of Asian dust events on the chlorophyll a in the Yellow Sea: a preliminary analysis based on remote sensing

Qianguang Tu, Zengzhou Hao, Fang Gong, Delu Pan, Zhihua Mao, Qiankun Zhu

Proceedings Volume 8175, 81751L (2011) https://doi.org/10.1117/12.898077

KEYWORDS: Remote sensing, Ocean optics, Climatology, Aerosols, MODIS, Satellites, Temperature metrology, Oceanography, Composites, Water

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Showing 5 of 7 publications

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