نتایج جستجو برای: پایگاه ecmwf

تعداد نتایج: 10960  

2009
Jérôme Patoux Xiaojun Yuan Cuihua Li

[1] A wavelet-based method is described for incorporating swaths of surface pressure derived from scatterometer measurements into surface pressure analyses obtained from the European Centre for Medium-range Weather Forecasts (ECMWF). The resulting modified pressure fields are used to identify low-pressure centers over the Southern Ocean and to build statistics of midlatitude cyclones during 7 y...

2015
M. Rautenhaus M. Kern A. Schäfler R. Westermann

We present “Met.3D”, a new open-source tool for the interactive three-dimensional (3-D) visualization of numerical ensemble weather predictions. The tool has been developed to support weather forecasting during aircraft-based atmospheric field campaigns; however, it is applicable to further forecasting, research and teaching activities. Our work approaches challenging topics related to the visu...

Journal: :Journal of Climate 1999

Journal: :Bulletin of the American Meteorological Society 2019

2010
Xu Jianmin Kenneth Holmlund Zhang Qisong Johannes Schmetz

In order to examine the effectiveness of the NSMC scheme, a comparison was arranged under the cooperation frame between EUMETSAT and CMA (China Meteorological Administration). Two periods of data from Meteosat-5 including IR and WV channels were processed and compared by both the EUMETSAT and NSMC schemes. The comparison periods were one week long each, and in January and July respectively. The...

2004
H. W. VAN DEN BRINK

Meteorological extremes have large impacts on society. The fact that approximately 40% of the Netherlands is below sea level makes this country especially vulnerable to flooding, both from the sea and from rivers. This has resulted in extensive research on the statistics of extremes. However, applications to meteorological and hydrological situations are always hampered by the brevity of the av...

ژورنال: جغرافیا و توسعه 2019

لایه مرزی بخش کوچکی از لایه ورد سپهر است که به دلیل فرایندهایی که در داخل آن رخ می‌دهد، برای حیات انسان حائز اهمیت می-باشد. مطالعه حاضر با هدف واکاویی دگرگونی زمانی- مکانی ارتفاع لایه مرزی با رویکردی آماری – تحلیلی انجام شد. در این راستا از داده‌های ارتفاع لایه مرزی مرکز پیش بینی میان مدت هواسپهر اروپایی نسخه ERA-Interim با تفکیک مکانی 125/0×125/0 درجه قوسی و بازه زمانی 1979 تا 2015 استفاده گرد...

Journal: :پژوهش های جغرافیای طبیعی 0
محمد دارند استادیار گروه آب و هواشناسی، دانشکدة منابع طبیعی، دانشگاه کردستان سوما زندکریمی دانشجوی کارشناسی ارشد آب و هواشناسی، دانشکدة منابع طبیعی، دانشگاه کردستان

introduction precipitation is one of the most important meteorological variables in comparison with other climatic parameters. it varies extremely over time and space. the occurrence of this climate phenomenon requires specific circumstances in environment. its accurate measurement is important to a wide range of decision makers including hydrologists, agriculturalists, industrialists and etc. ...

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