نتایج جستجو برای: pressure wind spatio temporal

تعداد نتایج: 722041  

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Introduction Atmospheric boundary layer (ABL), is the lowest part of the atmosphere. Its behavior is directly influenced by its contact with earth surface. On earth it usually responds to changes in surface radiative forcing in an hour or less. In this layer physical quantities such as flow velocity, temperature, moisture, etc., display rapid fluctuations (turbulence) and vertical mixing is st...

Journal: :Progress in Nuclear Science and Technology 2011

Journal: :J. Geographic Information System 2011
Étienne Cossart

Glacier variation is one of the best indicators of climate change in mountainous environment. In French Alps, many temporal data are acquired by glaciologists at glaciers scale: geometrical parameters (surface area, thickness, length and front altitude) are surveyed since the end of the 19th century. Those parameters are necessary to estimate the mass-balance of glaciers and, then, an accurate ...

Journal: :پژوهش های جغرافیای طبیعی 0
مصطفی کریمی استادیار دانشکدة جغرافیا، دانشگاه تهران فرامرز خوش اخلاق استادیار دانشکدة جغرافیا، دانشگاه تهران سعید بازگیر استادیار دانشکدة جغرافیا، دانشگاه تهران مهناز جعفری دانشجوی دکترای آب‏ و هواشناسی سینوپتیک، دانشگاه شهید بهشتی

introduction atmospheric circulation patterns leads to different weather conditions and rainfall regime change is controlled by seasonal and irregular variations of atmospheric circulation pattern. variety and climate change, such as drought and flood result in changes in the spatio-temporal of precipitation, one of the important parameters conditions mentioned, heterogeneity in moisture transm...

2017
Louai Alarabi Mohamed F. Mokbel Mashaal Musleh

This paper presents ST-Hadoop; the first full-fledged opensource MapReduce framework with a native support for spatio-temporal data. ST-Hadoop is a comprehensive extension to Hadoop and SpatialHadoop that injects spatio-temporal data awareness inside each of their layers, mainly, language, indexing, and operations layers. In the language layer, ST-Hadoop provides built in spatio-temporal data t...

2005
H. Kettle C. J. Merchant

Long-term temporal averaging of meteorological data, such as wind speed and air pressure, can cause large errors in air-sea carbon flux estimates. Other researchers have already shown that time averaging of wind speed data creates large errors in flux due to the non-linear dependence of the gas transfer velocity on wind speed (Bates and Merli-vat, 2001). However, in general, wind speed is negat...

2004
Tony Griffiths Norman W. Paton Alvaro A. A. Fernandes Seung-Hyun Jeong Nassima Djafri

While there are many proposals for spatio-temporal data models and query languages, there is a lack of research into application development using spatio-temporal database systems. This paper seeks to redress the balance by exploring how to support database programming for spatio-temporal object databases, with specific reference to the Tripod spatio-temporal OODBMS.

2005
Gyözö Gidófalvi Torben Bach Pedersen

Recent advances in communication and information technology, such as the increasing accuracy of GPS technology and the miniaturization of wireless communication devices pave the road for Location– Based Services (LBS). To achieve high quality for such services, spatio– temporal data mining techniques are needed. In this paper, we describe experiences with spatio–temporal rule mining in a Danish...

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