Regional long-term climate change (1950-2000) in the midtropical Atlantic and its impacts on the hydrological cycle of Puerto Rico
Regional long-term climate change (1950-2000) in the midtropical Atlantic and its impacts on the hydrological cycle of Puerto Rico
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DOI：
10.1029/2010jd015414
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发表时间：
2011-06-18
影响因子：
4.4
通讯作者：
Gonzalez, Jorge E.
中科院分区：
文献类型：
--
作者：
Comarazamy, Daniel E.;Gonzalez, Jorge E.
北热带大西洋区域的大尺度气候数据表明，过去50年（1955-1959年至2000-2004年）气温有所上升，加勒比群岛附近的气温略有上升，北方区域的气温则大幅上升。这种模式可能是由同一研究区域的海表温度异常造成的，加勒比海盆的变化相对较小，东北部的异常则较强。这些变化可能与驱动该地区气候的NTA高压系统的长期模式变化有关。设计了一系列中尺度数值试验，研究这些大尺度变化对波多黎各岛水文循环的区域影响。结果表明，1950-2000年的时间框架增加东风地面风破坏了内陆水分平流和辐合区的模式，增加云底高度，降低了高海拔地区的总柱液态水含量。这些因素的结合导致波多黎各中部和东部山区的降水量减少。
Large-scale climate data for the north tropical Atlantic (NTA) region show that air temperatures have increased during the past 50 years (1955-1959 to 2000-2004) with moderate warming near the Caribbean islands to considerable heating in the northern region. This pattern may be driven by sea surface temperature anomalies in the same region of study that follow relatively small changes in the Caribbean basin to stronger anomalies in the northeast. These changes might be associated with changes in the long-term pattern of the NTA high-pressure system that drives climate in the region. A series of mesoscale numerical experiments were designed to study the regional impacts these large-scale changes have on the hydrological cycle of the island of Puerto Rico. Results indicate that increased easterly surface winds for the 1950-2000 time frame disrupts a pattern of inland moisture advection and convergence zone, increasing cloud base heights and reducing the total column liquid water content over high elevations. This combination of factors produces a reduction in precipitation over the central and eastern mountains of Puerto Rico.