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中国区域陆表热力作用时空分布及异常变化区域的成因 被引量:2

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摘要 基于互补相关理论,通过20cm蒸发皿气象观测数据分析了中国区域1980~2000年地表热力时空变化和分布.结果显示:四川盆地为中心的长江中上游流域和黑龙江北部地区热力作用显著异常增强;新疆和云南部分区域热力作用显著减少.上述区域内低云覆盖率也同步发生显著的异常变化.通过西太平洋副热带高压波动数据和热带风暴频率资料证实,天气系统是造成地表热力异常分布的主要原因,并合理地解释了中国大部分区域年降水周期性和准周期性波动的成因.同时利用NOAA-AVHRR卫星遥感数据,分析了下垫面性质变化对地表热力异常分布的影响.在地表植被增加区域,地表热力作用下降;在地表植被减少强度最大的城市化周边地区,热力作用显著增强,而更大范围的热力增强却与天气系统引发的低云异常减少有关.
出处 《中国科学(D辑)》 CSCD 北大核心 2009年第11期1530-1541,共12页 Science in China(Series D)
基金 国家重点基础研究发展计划(编号:2006CB403607) 中国科学院知识创新工程项目(编号:KZCX2-YW-219) 国家自然科学基金(批准号:40675047)资助
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