Variations of the tropical Atlantic and Pacific SSS minimum zones and their relations to the ITCZ and SPCZ rain bands (1979–2009)
Variations of the tropical Atlantic and Pacific SSS minimum zones and their relations to the ITCZ and SPCZ rain bands (1979–2009)
复制标题
热带大西洋和太平洋SSS最低区的变化及其与ITCZ和SPCZ雨带的关系（1979-2009）
DOI：
--
复制
发表时间：
2015
期刊：
影响因子：
--
通讯作者：
G. Reverdin
中科院分区：
文献类型：
--
作者：
Michel Tchilibou;T. Delcroix;G. Alory;S. Arnault;G. Reverdin
本研究重点关注大西洋和太平洋 2°N–12°N 范围内以及太平洋西三分之一地区 6°S–16°S 范围内纬向延伸的低海表盐度 (SSS) 水域的时空变化。该分析基于过去三十年从自愿观测船、TAO/TRITON 和 PIRATA 系泊装置、Argo 浮标和（少数）CTD 剖面收集的现场 SSS 观测结果的组合。大西洋和太平洋低 SSS 水域的平均纬度比与热带辐合带 (ITCZ) 和南太平洋辐合带 (SPCZ) 相关的蒸发减去降水量 (E-P) 最小值更偏向 1°–3°。在季节时间尺度上，夏半球E-P极小值向极地迁移，在大西洋ITCZ、太平洋SPCZ和太平洋ITCZ东部地区，E-P极小值比SSS极小值提前2~3个月。另一方面，太平洋 ITCZ 中西部地区 E-P 和 SSS 极小值的季节性位移是反相的。在年际时间尺度上，太平洋拉尼娜事件期间和大西洋经向偶极子（AMD）正位相期间，E-P和SSS极小值向极移（厄尔尼诺和AMD负位相期间反之亦然）。我们进一步记录了 E-P 和 SSS 最小值的长期（1979-2009）经向迁移，特别是在 SPCZ 地区，并讨论它们是否与记录的 SST 和风应力趋势一致。
This study focuses on the time-space variability of the low Sea Surface Salinity (SSS) waters extending zonally within 2°N–12°N in the Atlantic and Pacific and within 6°S–16°S in the western third of the Pacific. The analysis is based on a combination of in situ SSS observations collected in the last three decades from voluntary observing ships, TAO/TRITON and PIRATA moorings, Argo floats, and (few) CTD profiles. The mean latitudes of the Atlantic and Pacific low SSS waters appear 1°–3° further poleward than the Evaporation minus Precipitation (E-P) minima linked to the Inter Tropical Convergence Zones (ITCZ) and South Pacific Convergence Zone (SPCZ). At the seasonal time scale, the E-P minima migrate poleward in summer hemispheres, leading the migration of the SSS minima by 2–3 months in the Atlantic ITCZ, Pacific SPCZ, and in the eastern part of the Pacific ITCZ. On the other hand, the seasonal displacements of E-P and SSS minima are in antiphase in the central and western parts of the Pacific ITCZ. At the interannual time scale, the E-P and SSS minima migrate poleward during La Nina events in the Pacific and during the positive phase of the Atlantic Meridional Dipole (AMD) in the Atlantic (and vice versa during El Nino and the negative phase of the AMD). We further document long-term (1979–2009) meridional migrations of the E-P and SSS minima, especially in the SPCZ region, and discuss whether or not they are consistent with documented SST and wind stress trends.
影响因子：
4.6
作者：
Skliris, Nikolaos;Marsh, Robert;Allan, Richard P.
通讯作者：
Allan, Richard P.