基于MODIS和CALIOP卫星遥感数据的气溶胶光学厚度与海洋初级生产力相关性
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摘要
利用2003~2014年的MODIS和2009~2014年的CALIOP卫星遥感数据产品,分析了我国华北地区(32°N~42°N,112°E~121°E)气溶胶光学厚度和西北太平洋部分海域(40°N~50°N,150°E~180°E)海洋初级生产力的时空分布,并研究了二者之间的相关性.结果表明:我国华北地区气溶胶光学厚度具有年季周期性,在每年的6、7月达到峰值;西北太平洋初级生产力同样具有年季周期性,在每年的8、9月达到峰值;从华北地区到西北太平洋,在5、6月可以发现比较明显的气溶胶传输通道,高空风场也与之对应;通过对长时间序列数据进行时滞相关性分析,发现华北地区气溶胶光学厚度与滞后其1~2个月的西北太平洋初级生产力有较高相关性,相关系数在0.7-0.8(通过a=0.05的显著性检验)之间.但其中存在滞后时间短相关系数低的海域,可能是受到洋流输送的影响.
Spatial and temporal distributions of aerosol optical depth(AOD) in Huabei area of China(32°N~42°N,112°E~121°E) and the ocean primary productivity in Northwestern Pacific Ocean(40°N~50°N,140°E~180°E) were analyzed using satellite remote sensing data from MODIS(2003~2014) and CALIOP(2009~2014).And the correlations between these two parameters were further studied.The results showed that:the AOD in Huabei area varied seasonally and peaked in June and July.The ocean primary productivity in Northwestern Pacific Ocean also showed seasonal periodicity and was highest in August and September.An aerosol transportation channel from Huabei area to the Northwestern Pacific Ocean was revealed in May and June,along with the high-altitude wind fields.Indicated by Lead-lag correlation analysis of long time-series data,relatively higher correlation coefficient(ranging from 0.7 to 0.8,tested by a = 0.05) was found between AOD in Huabei area and ocean primary productivity in Northwestern Pacific Ocean which lagged behind the former for 1 to 2 months.Nevertheless,areas with shorter lag time and lower correlation index might be affected by ocean current transportation.
Spatial and temporal distributions of aerosol optical depth(AOD) in Huabei area of China(32°N~42°N,112°E~121°E) and the ocean primary productivity in Northwestern Pacific Ocean(40°N~50°N,140°E~180°E) were analyzed using satellite remote sensing data from MODIS(2003~2014) and CALIOP(2009~2014).And the correlations between these two parameters were further studied.The results showed that:the AOD in Huabei area varied seasonally and peaked in June and July.The ocean primary productivity in Northwestern Pacific Ocean also showed seasonal periodicity and was highest in August and September.An aerosol transportation channel from Huabei area to the Northwestern Pacific Ocean was revealed in May and June,along with the high-altitude wind fields.Indicated by Lead-lag correlation analysis of long time-series data,relatively higher correlation coefficient(ranging from 0.7 to 0.8,tested by a = 0.05) was found between AOD in Huabei area and ocean primary productivity in Northwestern Pacific Ocean which lagged behind the former for 1 to 2 months.Nevertheless,areas with shorter lag time and lower correlation index might be affected by ocean current transportation.
引文
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[10]郑有飞,刘贞,刘建军,等.中国北部一次沙尘过程中沙尘气溶胶的时空分布及输送特性[J].中国沙漠,2013,33(5):1440-1452.
[11]施益强,温宥越,肖钟湧,等.基于MODIS数据的福建海域近10年净初级生产力时空变化研究[J].中国海洋大学学报:自然科学版,2015,46(9):61-68.
[12]Duce R A,Unni C K,Ray B J,et al.Long-range atmospheric transport of soil dust from Asia to the tropical North Pacific:Temporal variability[J].Science,1980,209(4464):1522-1524.
[13]David K R,Steve H.Grain size distribution and depositional processes of the mineral component of abyssal sediments:Lessons from the North Pacific[J].Paleoceanography,1995,10(2):251-258.
[14]邓祖琴,韩永翔,白虎志,等.中国大陆沙尘气溶胶对海洋初级生产力的影响[J].中国环境科学,2008,28(10):872-876
[15]李晓静,张鹏,张兴赢,等.中国区域MODIS陆上气溶胶光学厚度产品检验[J].应用气象学报,2009,20(2):147-156.
[16]周自江,王希稳,牛若芸.近47年中国沙尘暴气候特征研究[J].应用气象学报,2002,13(2):193-200.
[17]Liu Z,Liu D,Huang J,et al.Airborne dust distributions over the Tibetan Plateau and surrounding areas derived from the first year of CALIOP lidar observations[J].Atmospheric Chemistry&Physics,2008,8(16):5045-5060.
[18]康林,季明霞,黄建平,等.欧亚大气环流对中国北方春季沙尘天气的影响[D].兰州:兰州大学,2013.
[19]姜学恭,陈受钧,云静波.基于CALIOP资料的沙尘暴过程沙尘垂直结构特征分析气象[J].气象,2014,40(3):269-279.
[20]齐玉磊,葛觐铭,黄建平.北方地区MODIS和MISR与AERONET气溶胶光学厚度的比较及其时空分布分析[J].科学通报,2013,58(17):1670-14679.
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[23]韩永翔,赵天良,宋连春,等.北太平洋地区春季粉尘的空间分布特征——观测及模拟研究[J].中国环境科学,2005,25(3):257-201.
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