Characterisation and quantification of regional diurnal SST cycles from SEVIRI
Characterisation and quantification of regional diurnal SST cycles from SEVIRI
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SEVIRI 区域昼夜海温周期的表征和量化
DOI：
10.5194/os-10-745-2014
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发表时间：
2014
期刊：
影响因子：
3.2
通讯作者：
J. Høyer
中科院分区：
文献类型：
--
作者：
Ioanna Karagali;J. Høyer
抽象的。来自对地静止旋转增强型可见光和红外成像仪 (SEVIRI) 的每小时海表温度 (SST) 场为表征和量化大西洋、地中海和北欧陆架海海表温度的日循环提供了独特的机会。 SEVIRI 六年的海表温度场根据高级沿轨扫描辐射计 (AATSR) 气候再处理 (ARC) 数据集进行了验证。基于超过 53 × 106 的匹配，总体 SEVIRI-AATSR 偏差为 -0.07 K，标准差为 0.51 K。昼夜信号的识别需要代表通常发生在夜间或中风和强风下的良好混合条件的海温基础温度场。这些场是从 SEVIRI 档案中生成的，并针对黎明前 SEVIRI SST 和来自漂流浮标的夜间 SST 进行了验证。对地基温度场进行测试的不同方法揭示了与单日黎明前值相比，多日夜间海表温度平均所带来的变化。地中海和波罗的海的昼夜变暖最为明显，而热带地区的昼夜信号较弱。与热带地区相比，高纬度地区的昼夜变暖持续时间更长。在特定区域，最大月平均日间信号可达 0.5 K。
Abstract. Hourly SST (sea surface temperature) fields from the geostationary Spinning Enhanced Visible and Infrared Imager (SEVIRI) offer a unique opportunity for the characterisation and quantification of the diurnal cycle of SST in the Atlantic Ocean, the Mediterranean Sea and the northern European shelf seas. Six years of SST fields from SEVIRI are validated against the Advanced Along-Track Scanning Radiometer (AATSR) Reprocessed for Climate (ARC) data set. The overall SEVIRI–AATSR bias is −0.07 K, and the standard deviation is 0.51 K, based on more than 53 × 106 match-ups. Identification of the diurnal signal requires an SST foundation temperature field representative of well-mixed conditions which typically occur at night-time or under moderate and strong winds. Such fields are generated from the SEVIRI archive and are validated against pre-dawn SEVIRI SSTs and night-time SSTs from drifting buoys. The different methodologies tested for the foundation temperature fields reveal variability introduced by averaging night-time SSTs over many days compared to single-day, pre-dawn values. Diurnal warming is most pronounced in the Mediterranean and Baltic seas while weaker diurnal signals are found in the tropics. Longer diurnal warming duration is identified in the high latitudes compared to the tropics. The maximum monthly mean diurnal signal can be up to 0.5 K in specific regions.
影响因子：
13.5
作者：
Owen Embury;C. Merchant;G. Corlett
通讯作者：
Owen Embury;C. Merchant;G. Corlett
影响因子：
8
作者：
Donlon, C.;Robinson, I.;Rayner, N.
通讯作者：
Rayner, N.