Variability of the low-level cross-equatorial jet of the western Indian Ocean since 1660 as derived from coral proxies
Variability of the low-level cross-equatorial jet of the western Indian Ocean since 1660 as derived from coral proxies
复制标题
1660 年以来西印度洋低空跨赤道急流的变化（源自珊瑚代理）
DOI：
10.1029/2007gl032409
复制
发表时间：
2008-01-11
影响因子：
5.2
通讯作者：
Luterbacher, Juerg
中科院分区：
文献类型：
--
作者：
Gong, Dao-Yi;Luterbacher, Juerg
利用印度洋盆地逐月季节分辨的珊瑚资料，统计重建了1660-1957年西印度洋6-7-8月(JJA)低空急流，并对高频和低频进行了巧妙的估计。合理地捕捉到了厄尔尼诺/南方涛动(ENSO)信号。从17世纪末到19世纪末，喷气式飞机的强度显著增加。20世纪重建急流的减少与以前的研究不一致，这些研究表明南亚夏季风(SASM)的增强与全球快速变暖有关。急流的重建对于理解SASM的变异性和验证历史季风模拟是有用的。
Using monthly-seasonally resolved coral proxies from the Indian Ocean basin, we statistically reconstruct the June-July-August (JJA) low-level jet in western Indian Ocean from 1660-1957 with skillful estimates for high-and low-frequencies. The El Nino/Southern Oscillation (ENSO) signals are reasonably captured. The strength of the jet significantly increases from the late 17th century to late 19th century. The decreasing in reconstructed jet in 20th century disagrees with previous studies which indicated an enhancement of Southern Asian summer monsoon (SASM) in association with the rapid global warming. The jet reconstructions are useful for understanding of SASM variability and the validation of historical monsoon simulation.