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Author: V. Krishnamurthy
Publisher:
ISBN:
Category : El Niño Current
Languages : en
Pages : 70
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Book Description
Author: V. Krishnamurthy
Publisher:
ISBN:
Category : El Niño Current
Languages : en
Pages : 70
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Book Description
Author: Roxy M. K.
Publisher: Ministry of Environment, Forest and Climate Change (MoEF&CC), Government of India
ISBN: 819331316X
Category : Science
Languages : en
Pages : 19
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Book Description
Variability of the Indian summer monsoon has increased significantly since the 1950s. For several regions across India, this means an increase in long dry periods with low or no rainfall, intermittent with short, intense spells of rainfall. These changes are particularly significant for the western, central and eastern states of India where more than 55% of the cultivated area is largely rainfed and where the adaptive capacity is the lowest. The large-scale secular changes in monsoon rainfall are attributed to the increase in global emissions of greenhouse gases and air pollutants. At the same time, local changes through urbanization, land use changes and deforestation have brought in a non-uniform response in these rainfall trends. Changes in the onset, duration and intensity of the rainfall call for a reassessment of the crop calendar and climate resilient measures for the food-water-energy sectors of the country. Global warming has also altered the relationship between sea surface temperatures and other predictors of monsoon rainfall, introducing increasing challenges and uncertainties in the monsoon forecasts. Climate projections indicate a further increase in the monsoon variability and a shortening of the rainy season in the future, though there is considerable disagreement between model simulations.
Author: P. N. Vinayachandran
Publisher: Daya Books
ISBN: 9788170355229
Category : Monsoons
Languages : en
Pages : 190
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Book Description
This Publication Presents A Collection Of 16 Selected Research/ Review Papers On Various Aspects Of Monsoons Those Were Discussed During The International Roundtable On Understanding And Prediction Of Summer And Winter Monsoons Held At Jakarta/ Bandung, Indonesia During 21-24 November, 2005. Monsoons Modulate The Rhythm Of Life In Several Countries. The Amount Of Rain Received During Monsoons Critically Controls The Way Of Life, Culture And Economy. The Word Monsoon Indicates A Rainy Season But The Domain Of Monsoon Encompasses Seasonal Changes In Prevailing Surface Wind Direction Especially Between Summer And Winter. The Ability To Anticipate How Monsoon And The Resultant Climate, Will Behave From One Year To The Next Will Lead To Better Management Of Agriculture, Water Supplies, Fisheries And Other Resources. Prediction Of Monsoon However Is One Of The Major Challenges Of Climate Research As It Is An Extremely Complex Phenomenon Involving Variabilities Over A Wide Range Of Spatial And Temporal Scales. The Topics Covered In This Volume Include Observed Aspects Of Monsoons In Several Countries, Analyses Of Model Simulations And Forecasts, Survey Of Instrumentation And Analysis Techniques And Projections Of Monsoon In The Future Climate. Hence, The Publication Is Undoubtedly, A Useful Reference Material For The Meteorologists And Experts Working In The Area Of Monsoon Prediction And Will Help The Developing Countries In Working Out Appropriate Plans And Programmes On Understanding And Prediction Of Monsoons. Contents Chapter 1: Short And Long Range Forecasting In India By S R Kalsi; Chapter 2: Medium And Extended Range Forecasting Of Indian Monsoon By A K Bohra, G Iyengar, E N Rajagopal, M Dasgupta, R Ashrit, S Basu And A K Mitra; Chapter 3: Prediction Of Local Rainfall From Gcm Output Using Projection Pursuit Technique By A H Wigena, Aunuddin And Rizaldi Boer; Chapter 4: Long-Range, High-Resolution Forecast Of Monsoon Rainfall By P Goswami, G K Patra, K C Gouda And V S Prakash; Chapter 5: An Overview Of Advanced Instrumentation And Network: Present Status And Future Modernisation Plan Of The National Meteorological Service Of India By S K Banerjee; Chapter 6: Data Assimilation At Ncmrwf: Case Study Of Recent Monsoon System By M Das Gupta, John P George, R Ashrit; Chapter 7: Development Of Statistical-Dynamical Models At Ncmrwf For Predicting Location Specific Weather During Monsoon By P Maini And Ashok Kumar; Chapter 8: A Tropical Mid-Range Forecast Model Based On The Single Value Decomposition Of The Madden-Julian Oscillation Chien Wan Tham; Chapter 9: Association Between Indonesian Rainfall And The Indian Ocean Dipole By P N Vinayachandran And Ravi S Nanjundiah; Chapter 10: Decadal To Interdecadal Time Scale Climate Variability: In Context Of Asian/ Indian Monsoon System By R K Tiwari And S Sri Lakshmi; Chapter 11: Influence Of Eurasian And Tibetan Snow On Indian Summer Monsoon By S K Dash, P Parth Sarthi And M S Shekhar; Chapter 12: Influence Of Enso On The Southwest Monsoon Rainfall Over Pakistan: A Review By Tariq Masood Ali Khan, Arif Mahmood, M M Rabbani, S Moazzam Ali And Nadeem Faisal; Chapter 13: The Monsoonal Climatic Profile Of Sri Lanka By Chandima Gomes; Chapter 14: Impact Of Monsoons To Tanzania By E Matari; Chapter 15: Prediction Of Extreme Weather And Climate In The Indonesian Maritime Continent Based On Sunspot Numbers By The Houw Liong And Plato Martuani Siregar; Chapter 16: Characteristics Of India Summer Monsoon In The Warming Scenario By S K Patwardhan, K Krishna Kumar, K Kamala, Preethi Bhaskar, J V Revadekar And K Rupa Kumar.
Author: Deepthi Achuthavarier
Publisher:
ISBN:
Category : Monsoons
Languages : en
Pages : 179
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Book Description
The role of the Indian and Pacific sea surface temperature (SST) variability in the intraseasonal and interannual variability of the Indian summer monsoon rainfall is examined by performing a set of regionally coupled experiments with the Climate Forecast System (CFS), the latest and operational coupled general circulation model (CGCM) developed at the National Centers for Environmental Prediction (NCEP). The intraseasonal and interannual variability are studied by isolating oscillatory and persistent signals, respectively, from the unfiltered daily rainfall anomalies using multi-channel singular spectrum analysis (MSSA). This technique identifies nonlinear oscillations, its variance and period without preconditioning the data with a filter and also helps to separate the intraseasonal and low frequency climate signals from the daily variability. It is found that, although the model has large amount of daily variance in rainfall, the combined variance of coherently propagating intraseasonal oscillations is only about 7% while the corresponding number in the observations is 11%. The model has three intraseasonal oscillations with periods around 106, 57 and 30 days. The 106-day mode has a characteristic large-scale pattern extending from the Arabian Sea to the West Pacific with northward and eastward propagations. These features are similar to the northeastward propagating 45-day mode found in the observations except for the longer period. The 57-day mode is more dominant in the region, 60[degrees]E-100[degrees]E and is strictly northward-propagating. The 30-day mode appears to be equivalent to the northwestward propagating oscillation in the observations. The dominant low frequency persistent signal in the region is due to the El Niño-Southern Oscillation (ENSO). The ENSO-related rainfall anomalies, however fail to penetrate into the Extended Indian Monsoon Rainfall (EIMR) region, and therefore, the ENSO-monsoon relationship in the model is weak. Regionally coupled simulations of the CFS have revealed that the northeastward propagating 106-day mode exists in the model with weak amplitude and reduced variance even when the air-sea interaction over the Indian Ocean is suppressed. However, this mode was not obtained when the Indian Ocean SST variability is reduced to climatology. The spatial structure and propagation of the 106-day mode appear to be unaffected by the Pacific SST variability; i.e., a simulation with climatological SST in the Pacific reproduced this mode. The 30-day northwestward propagating mode showed little change with respect to the Indian Ocean SST, but is dependent on the air-sea interactions over the west Pacific. Simulations using prescribed SST in the Indian Ocean showed that the spatial structure of the ENSO mode in the Indian Ocean is dependent on the air-sea interaction in that region. It is argued that the western Indian Ocean in this model is over-sensitive to atmospheric momentum fluxes and therefore cools down quickly in response to the ENSO-induced circulation anomalies. Further, this process creates a dipole pattern with cool (warm) western and warm (cool) eastern Indian Ocean during a La Niña (El Niño) event. This dipole prevents the ENSO anomalies from reaching the EIMR region and causes the incorrect ENSO-monsoon relationship. It is also found that such a dipole pattern, although with less variance is present even in the absence of the ENSO variability. The monsoon rainfall variability in the absence of the ENSO could be dictated by internal dynamics in this model.
Author: Chih-Pei Chang
Publisher: World Scientific
ISBN: 9814343404
Category : Science
Languages : en
Pages : 609
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Book Description
This book presents a current review of the science of monsoon research and forecasting. The contents are based on the invited reviews presented at the World Meteorological Organization's Fourth International Workshop on Monsoons in late 2008, with subsequent manuscripts revised from 2009 to early 2010. The book builds on the concept that the monsoons in various parts of the globe can be viewed as components of an integrated global monsoon system, while emphasizing that significant region-specific characteristics are present in individual monsoon regions. The topics covered include all major monsoon regions and time scales (mesoscale, synoptic, intraseasonal, interannual, decadal, and climate change). It is intended to provide an updated comprehensive review of the current status of knowledge, modeling capability, and future directions in the research of monsoon systems around the world.
Author: Jasti S. Chowdary
Publisher: Elsevier
ISBN: 0128224320
Category : Science
Languages : en
Pages : 496
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Book Description
Indian Summer Monsoon Variability: El Niño-Teleconnections and Beyond presents the improved understanding of Indian Monsoon teleconnections (ENSO and Non-ENSO), new advances, and preferred future steps. Special emphasis is given to non-ENSO teleconnections which have been poorly understood for decades. With growing monsoon rainfall extremes across the Indian Subcontinent, a new understanding of monsoon environmental factors that are driven remotely through teleconnections is a trending topic. Finally, the book reviews current understanding ofthe observational and modeling aspects of Indian monsoon teleconnections. This is a must-read for researchers and graduate students in atmospheric science and meteorology. Presents teleconnections associated with the Indian summer monsoon from a global perspective Discusses new pathways that connect the remote drivers to Indian summer monsoon variability Covers a wide range of mechanisms, processes, and science questions in relation to monsoon variability from interannual, decadal to climate change time scales
Author: Chih-pei Chang
Publisher: World Scientific
ISBN: 9813200928
Category : Science
Languages : en
Pages : 396
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Book Description
This book is the third edition of a book series on the state of the science of monsoon research and forecasting. The series is updated approximately every five years based on the invited reviews of the World Meteorological Organization's International Workshop on Monsoons (IWM). The third edition is an outgrowth of the reviews initially presented in late 2013 at IWM-V, with manuscripts revised and updated through 2015 and early 2016. As in previous editions, the book builds on the concept that the monsoon in various parts of the globe can be viewed as components of an integrated global monsoon system, while also emphasizing that significant region-specific characteristics are present in individual monsoon regions. In addition to the regional monsoons, the current volume covers contemporary topics with emphasis on intraseasonal oscillations, extreme weather, decadal variability, climate change, and summary of recent field experiments including CINDY/DYNAMO in the Indian Ocean and the Asian Monsoon Years.World Scientific Series on Asia-Pacific Weather and Climate is indexed in SCOPUS.
Author: V. Krishnamurthy
Publisher:
ISBN:
Category : Frequencies of oscillating systems
Languages : en
Pages : 64
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Book Description
Author: Bin Wang
Publisher: Springer Science & Business Media
ISBN: 9783540406105
Category : Nature
Languages : en
Pages : 906
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Book Description
This is a timely, interdisciplinary scientific overview of the atmosphere, the ocean and the land surface as it interacts with physical, chemical and biological processes. The high level of detail sets it apart from other studies of monsoon meteorology. The text includes analysis of paleoclimate records, human influences on the monsoon climate and the economic impacts of the monsoon on economies and to human health.
Author: V. Krishnamurthy
Publisher:
ISBN:
Category : Atmospheric circulation
Languages : en
Pages : 52
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Book Description
