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OALib Journal期刊
ISSN: 2333-9721
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与enso有关的北印度洋sst年际变化*
Keywords: enso,sst,北印度洋,年际变化
Abstract:
？通过icoads(theinternationalcomprehensiveocean-atmospheredataset)船测资料,验证了elni?o引发的北印度洋(northindianocean,nio)海表温度(sst)的2次增暖过程。前人研究发现,第1次增暖发生在elni?o盛期,源于elni?o导致的大气环流变化产生了正的短波辐射及潜热通量异常;第2次增暖发生在elni?o消亡的夏季,是由于反对称风场异常导致蒸发失热减少所造成。研究进一步发现,短波辐射和潜热通量在这两次增暖中都有着重要作用,但二者的作用在时间上并不一致。两次增暖过程都是短波辐射首先产生影响,其后才是风场导致的潜热通量的变化。两次增暖在东西两个海盆也存在差异,第1次增暖主要集中在阿拉伯海区域,第二次增暖在东西两个海盆都较明显。另外,通过elni?o和lani?a对比发现,enso对北印度洋sst的影响具有不对称性。elni?o期间北印度洋产生2到3次增暖,而lani?a只有第二年夏季的降温比较明显,强度也比较弱。
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