Characterizing ERA-Interim and ERA5 surface wind biases using ASCAT
نویسندگان
چکیده
منابع مشابه
Evaluation of HY-2A Scatterometer Wind Vectors Using Data from Buoys, ERA-Interim and ASCAT during 2012-2014
The first Chinese operational Ku-band scatterometer on board Haiyang-2A (HY-2A), launched in August 2011, is designed for monitoring the global ocean surface wind. This study estimates the quality of the near-real-time (NRT) retrieval wind speed and wind direction from the HY-2A scatterometer for 36 months from 2012 to 2014. We employed three types of sea-surface wind data from oceanic moored b...
متن کاملAscat Scatterometer Wind Data Processing
The Advanced scatterometer, ASCAT, on MetOp-A was launched on 19 October 2006 as the third wind scatterometer currently in space joining up with the ERS-2 and the SeaWinds scatterometers. Scatterometers measure the radar backscatter from wind-generated cm-size gravity-capillary waves and provide highresolution wind vector fields over the sea with high quality. In this paper we show progress in ...
متن کاملمقایسة مجموعه داده‌های ERA5 و ERA-Interim در محاسبة تغییرات جرم کوتاه‌مدت جوی و اثرات آن بر ارتفاع ژئویید
میدان گرانی حاصل از مشاهدات گرانی‌سنجی ماهواره‌ای مانند GRACE شامل خطاهایی ناشی از نوفة دستگاهی، نمونه‌برداری مکانی ناهم‌سانگرد (anisotropic) و خطای تداخل سیگنال (aliasing) و زمانی ناشی از نقص مدل‌سازی تغییرات جرم کوتاه‌مدت زمین است. کیفیت مشاهدات GRACE در مأموریت GRACE-FO بهبود یافت، اما خطای تداخل سیگنال زمانی همچنان یک عامل تأثیرگذار بر گرانی محاسباتی از مشاهدات می‌باشد. به همین دلیل محاسبه ...
متن کاملASCAT wind quality under high subcell wind variability conditions
The assessment and validation of the quality of satellite scatterometer vector winds is challenging under increased subcell wind variability conditions, since reference wind sources such as buoy winds or model output represent very different spatial scales from those resolved by scatterometers (i.e., increased representativeness error). In this paper, moored buoy wind time series are used to as...
متن کاملSimulation of the Wind Performance of ASCAT
In this note I use the ERS wind processing chain to simulate noisy backscatter values for ASCAT, retrieve winds from those, and compare them to the "true" wind. It is shown that, in order to achieve a constant performance versus across track node number, the instrument noise may be larger at the outer parts of the swath. This effect is quantified, and 25 versus 50 km resolution is investigated.
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ژورنال
عنوان ژورنال: Ocean Science
سال: 2019
ISSN: 1812-0792
DOI: 10.5194/os-15-831-2019