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India Meteorological department has added many data and research networks during the 135 years for climate-dependent sectors, such as agriculture, forestry, and hydrology, rendering a modern scientific background to atmospheric science in India. The inclusion of the latest data from satellites and other modern observation platforms, such as Automated Weather Stations (AWS), and ground-based remote-sensing...
The purpose of this study is to examine the advantages of using higher resolution regional model in simulating the temperature and precipitation over India. The Regional Climate Model version 3 (RegCM3) has been integrated to simulate the Indian summer monsoon rainfall for a number of years at two horizontal resolutions 55 and 30 km. The characteristics of interannual variations in the contrasting...
The extreme weather systems like thunderstorms, tropical cyclones, heavy rainfall and monsoon depression evolve through different scales of processes. The genesis and development of weather events involve complex interaction mechanism of mesoscale convective organization embedded in large-scale circulation. The skill of prediction of rainfall associated with extreme weather events as well as its impact...
A seasonal prediction system is being developed at NCMRWF under the Seasonal Prediction and Application to Society (SeaPrAS) programme. Ensemble integrations have been carried out using the Indian global Climate model (In-GLM1) for 23 monsoon seasons with observed, climatological and persisted sea surface temperature forcing. It is found that the model simulated climatology is reasonably good, however,...
ISMR with its annual, seasonal and daily variability affects most of social, economic and human activities throughout the Indian subcontinent. In particular, the drought and floods not only affect all types of agricultural products but is also responsible for loss of human lives and property. Late or prolonged monsoon break can lead to catastrophic effects. The knowledge of the intra seasonal and...
In this study surface parameters such as dry-bulb temperature, dew-point temperature and wind speed at 8:30 IST (0300 UTC) from 32 Government Inter Colleges (GICs) in Uttarakhand are assimilated into a high-resolution Weather Research and Forecasting (WRF) version 2.2 model by using Three-Dimensional Variational (3DVAR) surface data assimilation technique. These surface weather observations are made...
The performance of the UK Met Office’s coupled ocean-atmosphere General Circulation Model (GCM) is evaluated in simulation of summer monsoon rainfall over Indian monsoon region. The UK Met Office’s Global Seasonal (GloSea) forecasting model is initialized at 0000 UTC of 1st May and integrated for a period of 6 month with 15 ensemble members to generate the model forecast. These experiments have been...
It is well know that the south west monsoon or popularly known summer monsoon dictates the economy of the sub-continent. A good monsoon year results in good rainfall increased production and a boom in the economy on the contrary a bad monsoon year with deficit rainfall results in decrease in the yield and a subsequent reduction in agricultural production and economy of the country. Indian Government...
A method to improve the predictability of the seven models in the DEMETER project is proposed. This technique has been applied to investigate the effect on the predictability of seasonal precipitation (June–July–August) in the central Indian region. Three best models of DEMETER have been selected based on error and correlation analysis and standard deviation of the observed data. It is found that...
Indian summer monsoon circulation including the monsoon rainfall has been simulated with the regional climate model (RegCM3) for two different years associating an ENSO and a drought year. The horizontal resolution of the model is 60 Km covering the entire Indian subcontinent. The model has been simulated for the period June–August for 1997 and 2002, of which 1997 was an ENSO year and 2002 was a drought...
Global warming has caused the world’s surface temperature to rise at an unprecedented rate and these changes have caused the snow and ice to melt rapidly. The variability of temperature as consequence of global warming plays a crucial role on the snow over the western Himalaya which is a natural water reservoir by releasing large quantity of fresh water throughout the year in the important rivers...
A severe thunderstorm produced a tornado (F0 on the Fujita-Pearson scale), close to Ludhiana airport (Punjab), north-west region of India (30.8° N, 76.0° E) on 15 August 2007. Another severe thunderstorm produced a tornado (F3 on the Fujita-Pearson scale) which affected Rajkanika block of Kendrapara district of Orissa (20.7° N, 86.6° E) in the afternoon of 31 March 2009. An attempt is made to simulate...
An attempt has been made to understand dynamically the stagnation in the advancement of southwest monsoon from an energetics point of view. Recent four cases of stagnation of duration more than 10 days during 2002–2006 have been selected. For each case, different energy terms, their generation and conversion among different terms have been computed during the stagnation period and also during the...
There is a considerable scope for decreasing the vulnerability of agriculture to increasing weather and climatic variability through weather forecast based agro-advisories. India Meteorological Department (IMD), Ministry of Earth Sciences (MoES), is operating an integrated Agro-Meteorological Advisory Service (AAS) at district level, in India, which represents a small step towards agriculture management...
Rain water is the most vital and a critical input for agricultural production in rainfed farming areas in Maharashtra state. Recent droughts in Vidarbha region had adversely affected the crop production and economic condition of dryland farmers. The present study was undertaken in Amravati division of Vidarbha for assessing drought potential and its impact on agricultural production. The decadal variation...
Climate change is one of the most important global environmental challenges, with implications for food production and sustainability at global and national level. Therefore, question arises, how can productivity be increased while ensuring the sustainability of agriculture and the environment for future generations? Decision makers need information supplied by research to make informed choices about...
Every year crops are being damaged by pests and diseases. Due to lack of proper operational forecasting system for the incidences of pests and diseases, it becomes difficult to adopt plant protection measures at right time. It has been established with fair degree of accuracy that climate/weather play major role in the incidences of pests and diseases. Thus there is great scope of utilizing meteorological...
Farmers consider many variables in making agricultural decisions. The farmer must often choose his inputs for the production function before variables such as weather are known. The uncertainties associated with weather can however be mitigated with the use of decision support tools. As the specific relationships of weather, disease development and crop maturity are determined through research, the...
Agricultural production in many parts of India continues to be largely dependant on weather and climatic fluctuations despite several impressive advances made in the field of agricultural technology over the last few decades. Bastar Plateau ACZ (agro-climatic zone) is covering four districts i.e. Kanker, Dantewada, Bijapur and Bastar districts with a geographical area of around 39,000 sq. kms. Approximately...
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