Regionally coherent Little Ice Age cooling in the Atlantic Warm Pool
Regionally coherent Little Ice Age cooling in the Atlantic Warm Pool
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DOI：
10.1029/2009gl040445
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发表时间：
2009-11
影响因子：
5.2
通讯作者：
J. Richey;R. Poore;B. Flower;T. Quinn;D. Hollander
中科院分区：
文献类型：
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作者：
J. Richey;R. Poore;B. Flower;T. Quinn;D. Hollander
我们提出了 2 个新的十年分辨率有孔虫 Mg/Ca-SST 记录，涵盖过去 6-8 个世纪的墨西哥湾北部 (GOM)。这些记录提供了小冰期 (LIA) 冷却 2°C 的证据，与皮米盆地公布的镁/钙记录一致。将这 3 个记录与 GOM-加勒比地区现有的海温代理记录进行比较表明，大西洋暖池 (AWP) 的 LIA 降温幅度明显大于半球平均降温 <1°C。我们认为，LIA 期间 AWP 强度和空间范围的减少，加上大气环流的相关变化，可能解释了 LIA 期间在 GOM-加勒比地区观察到的区域海温模式。
We present 2 new decadal‐resolution foraminiferal Mg/Ca‐SST records covering the past 6–8 centuries from the northern Gulf of Mexico (GOM). These records provide evidence for a Little Ice Age (LIA) cooling of 2°C, consistent with a published Mg/Ca record from Pigmy Basin. Comparison of these 3 records with existing SST proxy records from the GOM‐Caribbean region show that the magnitude of LIA cooling in the Atlantic Warm Pool (AWP) was significantly larger than the mean hemispheric cooling of <1°C. We propose that a reduction in the intensity and spatial extent of the AWP during the LIA, combined with associated changes in atmospheric circulation may account for the regional SST patterns observed in the GOM‐Caribbean region during the LIA.