The 2009 stratospheric major warming described from synergistic use of BASCOE water vapour analyses and MLS observations
The 2009 stratospheric major warming described from synergistic use of BASCOE water vapour analyses and MLS observations
复制标题
通过协同使用 BASCOE 水蒸气分析和 MLS 观测描述的 2009 年平流层重大变暖
DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
G. Manney
中科院分区：
文献类型：
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作者：
W. Lahoz;Q. Errera;S. Viscardy;G. Manney
抽象的。利用BASCOE(比利时化学同化观测系统)平流层水汽分析和MLS(微波肢体探测仪)水汽观测，结合欧洲中期天气预报中心(ECMWF)的气象资料和由ECMWF气象资料得出的位涡(PV)资料，研究了2009年1-2月北半球冬季(1-2月)创纪录的主要平流层变暖。重点研究了冬季气旋性平流层极涡与副反气旋性平流层环流在主要变暖过程中的相互作用。结果表明，水汽分析场与气象场和PV场之间存在动力一致性。使用不同的方法，我们使用分析的水汽场来估计这段时间内极涡的下降，这段时间在~0.5kmd−1到~0.7kmd−1之间。新的结果包括对主要变暖期间水蒸气的分析，以及将MLS卫星数据同化到BASCOE模式中的益处的演示。
Abstract. The record-breaking major stratospheric warming of northern winter 2009 (January–February) is studied using BASCOE (Belgian Assimilation System for Chemical ObsErvation) stratospheric water vapour analyses and MLS (Microwave Limb Sounder) water vapour observations, together with meteorological data from the European Centre for Medium-Range Weather Forecasts (ECMWF) and potential vorticity (PV) derived from ECMWF meteorological data. We focus on the interaction between the cyclonic wintertime stratospheric polar vortex and subsidiary anticyclonic stratospheric circulations during the build-up, peak and aftermath of the major warming. We show dynamical consistency between the water vapour analysed fields and the meteorological and PV fields. Using various approaches, we use the analysed water vapour fields to estimate descent in the polar vortex during this period of between ~0.5 km day −1 and ~0.7 km day −1 . New results include the analysis of water vapour during the major warming and demonstration of the benefit of assimilating MLS satellite data into the BASCOE model.