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Comparison between MODIS-derived Day and Night Cloud Cover and Surface Observations over the North China Plain

Advances in Atmospheric Sciences 2018年第2期35卷 146-157页

作者： Xiao ZHANG saichun tan Guangyu SHI State Key Laboratory of Numerical Modeling of Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics Chinese Academy of Sciences Beijing 100029 China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science and Technology Nanjing 210044 China University of Chinese Academy of Sciences Beijing 100049 China

Satellite and human visual observation are two of the most important observation approaches for cloud cover. In this study, the total cloud cover （TCC） observed by MODIS onboard the Terra and Aqua satellites was compared with Synop meteorological station observations over the North China Plain and its surrounding regions for 11 years during daytime and 7 years during nighttime. The Synop data were recorded eight times a day at 3-h intervals. Linear interpolation was used to interpolate the Synop data to the MODIS overpass time in order to reduce the temporal deviation between the satellite and Synop observations. Results showed that MODIS-derived TCC had good consistency with the Synop observations; the correlation coefficients ranged from 0.56 in winter to 0.73 in summer for Terra MODIS, and from 0.55 in winter to 0.71 in summer for Aqua MODIS. However, they also had certain differences. On average, the MODIS-derived TCC was 15.16% higher than the Synop data, and this value was higher at nighttime （15.58%-16.64%） than daytime （12.74%-14.14%）. The deviation between the MODIS and Synop TCC had large seasonal variation, being largest in winter （29.53%-31.07%） and smallest in summer （4.46%-6.07%）. Analysis indicated that cloud with low cloud-top height and small cloud optical thickness was more likely to cause observation bias. Besides, an increase in the satellite view zenith angle, aerosol optical depth, or snow cover could lead to positively biased MODIS results, and this affect differed among different cloud types.

关键词： cloud cover MODIS cloud-top height cloud optical thickness aerosol optical depth view zenith angle

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Effects of Ocean Particles on the Upwelling Radiance and Polarized Radiance in the Atmosphere–Ocean System

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Advances in Atmospheric Sciences 2015年第9期32卷 1186-1196页

作者： SHI Chong WANG Pucai Teruyuki NAKAJIMA Yoshifumi OTA tan saichun SHI Guangyu Key Laboratory of Middle Atmosphere and Global Environment Observation Institute of Atmospheric PhysicsChinese Academy of Sciences University of Chinese Academy of Sciences Earth Observation Research Center Japan Aerospace Exploration Agency 2-1-1 Sengen Japan Agency for Marine-Earth Science and Technology State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of Sciences

Based on a vector radiative transfer model of the atmosphere–ocean system,the influence of oceanic components on radiation processes,including polarization effects,was investigated in the wavelength region ranging from 0.380 to 0.865 μ*** components considered were phytoplankton,inorganic suspended material（sediment）,and colored,dissolved organic *** to their important roles in oceanic radiation processes,the sensitivity of the bidirectional reflectance to the rough ocean surface,represented by the wind velocity 10 m above the ocean surface,and aerosol,were taken into *** results demonstrated that both radiance and polarized radiance just below the ocean surface were sensitive to the change of the concentrations of the considered components,while the dependence of polarized radiance on the observation geometry was more sensitive than *** differences in the specular plane existed between the impacts of the phytoplankton and sediment on the degree of polarization just above the ocean surface at 670 *** the top of the atmosphere（TOA）,polarization was relatively insensitive to changing concentrations of ocean particles at longer ***,the radiance at the TOA in the solar plane was more sensitive to the aerosol optical thickness than wind *** contrast,wind velocity strongly influenced the radiance at the TOA in the sun glint region,while the polarization degree showed less dependence in that ***,a nonlinear optimal inversion method was proposed to simultaneously retrieve the aerosol and wind velocity using radiance measurement.

关键词： ocean particles atmosphere–ocean system radiative transfer polarization ocean color

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Estimation and inter-comparison of dust aerosols based on MODIS, MISR and AERONET retrievals over Asian desert regions

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Journal of Environmental Sciences 2019年第2期31卷 154-166页

作者： Ammara Habib Bin Chen Bushra Khalid saichun tan Huizheng Che Tariq Mahmood Guangyu Shi Muhammad Tahir Butt Institute of Atmospheric Physics Chinese Academy of Sciences University of Chinese Academy of Sciences Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science &Technology International Institute of Applied Systems Analysis Department of Environmental Science International Islamic University Key Laboratory of Atmospheric Chemistry (LAC) Institute of Atmospheric CompositionChinese Academy of Meteorological Sciences (CAMS)CMA Pakistan Meteorological Department Center for Environmental Protection Studies PCSIR Laboratories Complex

This study presents detailed analysis of spatiotemporal variations and trend of dust optical properties i.e., Aerosol Optical Depth(AOD) and Angstrom component over Asian desert regions using thirteen years of data(i.e., 2001–2013) retrieved from Aerosol Robotic Network(AERONET), Moderate Resolution Imaging Spectroradiometer(MODIS) and Multi-angle Imaging Spectroradiometer(MISR). These regions include Solar Village, Dunhuang and Dalangzadgad and are considered as origin of desert aerosols in Asia. Mann–Kendall trend test was used to show the trend of AOD. The relationship of AOD with weather parameters and general AOD trend over different wavelengths has also been shown. AOD's trend has been observed significant throughout the year in Solar Village, while in Dunhuang and Dalanzadgad the significant trend has been found only in peak period(March–June).Analysis show high values of AOD and low values of angstrom in Solar Village during peak period. In Chinese desert regions, high values of AOD have been found during peak period and low values in pre-peak period. Significant relationship has been observed between AOD and average temperature in Solar Village and Dalanzadgad whereas rainfall and wind speed showed no significant impact on AOD in all desert regions.

关键词： AOD Angstrom exponent AERONET MODIS MISR Desert

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Satellite-derived primary productivity and its spatial and temporal variability in the China seas

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Journal of Geographical Sciences 2006年第4期16卷 447-457页

作者： tan saichun SHI Guangyu State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric Physics CAS Beijing 100029 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

The spatial and temporal variability of primary productivity in the China seas from 2003 to 2005 was estimated using a size-fractionated primary productivity model. Primary productivity estimated from satellite-derived data showed spatial and temporal variability. Annual averaged primary productivity levels were 564.39, 363.08, 536.47, 413.88, 195.77, and 100.09 gCm2a1 in the Bohai Sea, northern Yellow Sea （YS）, southern YS, northern East China Sea （ECS）, southern ECS, and South China Sea （SCS）, respectively. Peaks of primary productivity appeared in spring （April-June） and fall （October and November） in the northern YS, southern YS, and southern ECS, while a single peak （June） appeared in the Bohai Sea and northem ECS. The SCS had two peaks in primary productivity, but these peaks occurred in winter （January） and summer （August）, with the winter peak far higher than the summer peak. Monthly averaged primary productivity values from 2003 to 2005 in the Bohai Sea and southern YS were higher than those in the other four seas during most months, while those in the southem ECS and SCS were the lowest. Primary productivity in spring （March-June in the southern ECS and April-July in the other five areas） contributed approximately 41% on average to the annual primary productivity in all the study seas except the SCS. The largest interannual variability also occurred in spring （average standard deviation = 6.68）, according to the satellite-derived estimates. The contribution during fall （October-January in the southern ECS and August-November in the other five areas） was approximately 33% on average; the primary productivity during this period also showed interannual variability. However, in the SCS, the winter （December-March） contribution was the highest （about 42%）, while the spring （April-July） contribution was the lowest （28%）. The SCS did share a feature with the other five areas： the larger the contribution, the larger the interarmual variability. Spatial and tempora

关键词： China seas chlorophyll-a physicochemical environmental factors ocean primary productivity spatiotemporal variability

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Estimation of the Anthropogenic Heat Release Distribution in China from 1992 to 2009

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Acta meteorologica Sinica 2012年第4期26卷 507-515页

作者：陈兵石广玉王标赵剑琦檀赛春 State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of Sciences Graduate University of Chinese Academy of Sciences

Stable light data from Defense Meteorological Satellite Program （DMSP）/Operational Linescan System （OLS） satellites and authoritative energy consumption data distributed by National Bureau of Statistics of China were applied to estimating the distribution of anthropogenic heat release in China from 1992 to 2009. A strong linear relationship was found between DMSP/OLS digital number data and anthropogenic heat flux density （AHFD）. The results indicate that anthropogenic heat release in China was geographically concentrated and was fundamentally correlated with economic activities. The anthropogenic heat release in economically developed areas in northern, eastern, and southern China was much larger than other regions, whereas it was very small in northwestern and southwestern China. The mean AHFD in China increased from 0.07 W m-2 in 1978 to 0.28 W m-2 in 2008. The results indicate that in the anthropogenic heat- concentrated regions of Beijing, the Yangtze River Delta, and the Pearl River Delta, the AHFD levels were much higher than the average. The effect of aggravating anthropogenic heat release on climate change deserves further investigation.

关键词： DMSP/OLS data estimation distribution anthropogenic heat flux China

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中国近海初级生产力的遥感研究及其时空演化

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地理学报 2006年第11期61卷 1189-1199页

作者：檀赛春石广玉中国科学院大气物理研究所大气科学和地球流体力学数值模拟国家重点实验室

利用分级初级生产力模式反演估算了2003￣2005年0o￣41oN,105o￣130oE海域的初级生产力,并分析了它们的时空演化。同时还计算了该时段内渤海、北黄海和南黄海、东海北部和南部以及南海的平均初级生产力状况,结果得出它们的年平均初级生... 详细信息

利用分级初级生产力模式反演估算了2003￣2005年0o￣41oN,105o￣130oE海域的初级生产力,并分析了它们的时空演化。同时还计算了该时段内渤海、北黄海和南黄海、东海北部和南部以及南海的平均初级生产力状况,结果得出它们的年平均初级生产力(2003￣2005年)分别为564.39、363.08、536.47、413.88、195.77和100.09gCm-2a-1。北黄海、南黄海及东海南部的初级生产力分别在春季(4￣6月)和秋季(10、11月)出现两次峰值,且春季的峰值高于秋季。然而,南海的两个峰值则分别出现在冬季(1月)和夏季(8月),且冬季的峰值高于夏季。渤海和东海北部则呈现单峰(6月)分布。渤海和南黄海的初级生产力几乎在整年内都高于其它海域,而东海南部和南海的初级生产力则在整年内都低于其他海域。其中,南海的初级生产力最低,月平均全都低于400mgCm-2d-1。除南海以外的其它5个海域,在春季时期(东海南部为3￣6月,其他海域为4￣7月)的初级生产力最高,平均约占年平均值的41%,其年际变化也最大,平均标准偏差为6.68;而秋季时期(东海南部为10￣1月,其他海域为8￣11月)对年平均的贡献也很大,平均约33%;其他月份(东海南部为2月和7-9月,其他海域为12￣3月)的贡献则最小。南海的初级生产力则在冬季时期(12￣3月)最高,约占年平均的42%,夏末秋季(8￣11月)次之,约30%,春季时期(4￣7月)最低。叶绿素-a、海表温度、光合有效辐射、季风活动、河流排放、上升流、黑潮以及沿岸流等物理-化学环境因子是造成中国近海初级生产力时空演化的主要原因。

关键词：中国近海海洋初级生产力时空变化叶绿素-a 环境因子

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沙尘和生物气溶胶的环境和气候效应

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大气科学 2018年第3期42卷 559-569页

作者：石广玉檀赛春陈彬中国科学院大气物理研究所大气科学与地球流体力学国家重点实验室北京100029 南京信息工程大学气象灾害预报预警与评估协同创新中心南京210044 中国科学院大气物理研究所云降水物理与强风暴重点实验室北京100029

沙尘气溶胶对海洋生态系统的影响及其气候与环境效应,以及生物气溶胶对人类健康的影响及其气候效应是近年来大气气溶胶研究的热点问题。沙尘气溶胶和生物气溶胶之间有很强的联系,沙尘可作为空气中微生物的载体,沙尘气溶胶影响海洋生态... 详细信息

沙尘气溶胶对海洋生态系统的影响及其气候与环境效应,以及生物气溶胶对人类健康的影响及其气候效应是近年来大气气溶胶研究的热点问题。沙尘气溶胶和生物气溶胶之间有很强的联系,沙尘可作为空气中微生物的载体,沙尘气溶胶影响海洋生态系统之后又会影响海洋上空生物气溶胶的产生。本文回顾了国内外沙尘气溶胶对太平洋海域生态系统影响的研究进展,以及生物气溶胶的研究历史和气候效应,特别是中国科学院大气物理研究所十多年来的有关工作。

关键词：沙尘生物气溶胶生态环境气候效应

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Dust particles in free troposphere over Chinese desert region revealed from balloon borne measurements under calm weather conditions

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Atmospheric and Oceanic Science Letters 2019年第1期12卷 12-20页

作者： HABIB Ammara CHEN Bin SHI Guangyu IWASAKA Yasunobu NATH Debashis KHALID Bushra tan saichun MAHMOOD Tariq JIAO Reguang NTWALI Didier Institute of Atmospheric Physics Chinese Academy of Sciences College of Earth and Planetary Sciences University of Chinese Academy of Sciences Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Nanjing University of Information Science & Technology Kanazawa Univeristy Department of Environmental Science International Islamic University International Institute for Applied Systems Analysis The Abdus Salam International Centre for Theoretical Physics

The Taklamakan Desert in China is one of the major source regions for Asian dust *** balloon-borne measurements in this report were carried out in Dunhuang,in the Taklamakan Desert,during calm weather *** aerosol number concentration,size distribution,mass concentration,and horizontal mass flux due to westerly wind were *** measurements were performed on 17 August 2001,17 October 2001,11 January 2002,and 30 April *** channels(0.3,0.5,0.8,1.2,and 3.6μm in diameter)were used in the Optical Particle Counter for particle *** aerosol number concentration in the winter season(11 January 2002)at 3–5 km was very *** of free-tropospheric aerosols on 30 April 2002 was noticeable.A super-micron range was noticeable in the size distribution of all the *** variations in temperature and aerosol concentration were found at these inversion *** values of estimated mass concentration of aerosols were frequently observed in the atmosphere near the ground(i.e.,1–2 km);and interestingly,relatively high concentrations were frequently detected above 2 km from the *** patterns observed using ERA-Interim data at 500 and 850 hPa showed that westerly winds dominated in the Taklamakan Desert during the observation *** average horizontal mass flux of background Asian dust due to westerly wind was observed to fall within the range of 58.5–1219 tons km?2 d?*** profiles of aerosol number concentrations showed that significant transport of aerosols dominated in the westerly region(i.e.,4–7 km).

关键词： Aerosols optical particle counter balloon-borne measurements Dunhuang

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