Angell JK, 1981, Comparison of variations in atmospheric quantities with SST variations in equatorial eastern Pacific. Mon Wea Rev 109: 230-243.
An, S.-I., and I.-S. Kang, 2000, Interdecadal Change of the Structure of the ENSO Mode and Its Impact on the ENSO Frequency, Journal of Climate, 13 , pp 321-340.
Appa Rao, G., 1991, Drought and southwest monsoon, Training course on Monsoon
Ashok K, Guan ZY, and Yamagata T, 2001, Impact of the Indian Ocean Dipole on the relationship between the Indian monsoon rainfall and ENSO. Geophys Res Lett.,28, pp 4499-4502.
Ashok, K., S. K. Behera, S. A. Rao, H. Weng, and T. Yamagata, 2007, El Nino Modoki and its possible Teleconnection, J. Geophys. Res., 112, C11007, doi:10.1029/2006JC003798.
Banerji, S. and Chabra, B.M, 1964, Drought Characteristics and Estimating Probabilities of Their Occurrences, in Surface Waters Symposium, WMO/IASH, Belgium, Publication No. 63, pp 189-192.
Begueria, S., Vicente Serrano, S.M.,Martinez., M.A., 2010. A multiscalar global drought dataset: the SPEI base: a new gridded product for the analysis of drought variability and impacts. Bull. Amer.Met.Soc., 10, pp 1351-1356.
Behera, S. K., S. Krishnan, and T. Yamagata, 1999, Unusual Ocean-Atmosphere conditions in the tropical Indian Ocean during 1994. Geophys. Res. Lett., 26, pp 3001-3004.
Bhalme, H.N. and Mooley, D.A., 1980, Large scale droughts/floods and monsoon circulation. Mon. Wea. Rev., 108, pp 1197-1211.
Bhuiyan, C., R.P. Singh, and FN Kogan, 2006, Monitoring drought dynamics in the Aravalli region (India) using different indices based on ground and remote sensing data, Int. Journal of Applied Earth Observation and Geoinformation, 8, pp 289-302.
Chandrashekhar A, Kitoh A, 1998, Impact of localised sea surface temperature anomalies over the Equatorial Indian Ocean on the Indian summer monsoon. Journal of Meteorological Society of Japan,76, pp 841-853.
Charney, J. G. and Shukla, J., 1981, Predictability of monsoons, In monsoon dynamics (Ed. J. Lighthill), Cambridge University Press, pp 99-110.
Chowdhury, A., Dandekar, M.M., and Raut, P.S., 1989, Variability in drought incidence over India - A statistical approach, Mausam, 40, pp 207,-214.
Dai, A., 2011, Characteristics and trends in various forms of the Palmer Drought Severity Index (PDSI) during 1900-2008. J. Geophys. Res. 116, D12115.
Gadgil S and Gadgil S 2006, The Indian monsoon, GDP and agriculture. Econ. Political weekly, 41, pp 4887-1895
Gadgil S. 2009, The aberrant behaviour of the Indian monsoon in June 2009. Curr Sci, 97, 1291-1295
Gadgil, S. and P. V. Joseph, 2003, On breaks of the Indian monsson Proc. Indian Acad. Sci. (Earth Planet. Sci.), 112, 529-558.
Gadgil, S., P. N. Vinayachandran P. N. and P. A. Francis, 2003, Curr. Sci., 85, pp 1713-1719.
Glantz, M. H., R. W. Katz and N. Nicholls (Eds.), 1991, Teleconnections linking worldwide climate anomalies. Cambridge University Press, pp 535.
Gore, P. G., Thakur Prasad and H. R., Hatwar, 2010, Mapping of drought areas over India, NCC Research Report. No.12, India Meteorological Department, Pune.
Gore, P.G. and K.C. Sinha Ray, 2002, Variability in drought incidence over districts of Maharashtra, Mausam, 53, pp 533-542.
Guhathakurta P, Koppar AL, Krishan U, Menon P. 2011a. New rainfall series for the districts, meteorological sub-divisions and country as whole of India. National Climate Centre Research Report No: 2/2011, India Meteorological Department, Pune, India
Guhathakurta, P., 2003, Drought in districts of India during the recent all India normal monsoon years and its probability of occurrence. Mausam, 54, pp 542-545.
Heddinghaus, T.R., 1991, Monitoring and Dissemination of Drought Conditions at the Joint Agricultural Weather Facility, in D.A.Wilhite, D.A.Wood, and P.A.Kay (eds.), Proceedings of the Seminar and Workshop on Drought Management and Planning, Institute of Agriculture and Natural Resources, University of Nebraska-Lincoln, pp 67- 72.
Heim, R.R., 2002, A review of twentieth century drought indices used in the United States, Bulletin of the American Meteorological Society, 83, pp 1149-1165.
Hewitt, K. 1997, Regions at Risk: A Geographical Introduction to Disasters, Addison-Wesley Longman, UK.
Izumo, T., C. B. Montegut, J.-J. Luo, et al., 2008: The role of the western Arabian sea upwelling in Indian monsoon rainfall variability, J. Climate, 21, pp 5603-5623.
Joseph, P. V. and Pillai, P. V., 1984, Air sea interaction on a seasonal scale over north Indian Ocean Part I: Interannual variation of sea surface temperature and Indian monsoon rainfall, Mausam, 35, pp 323-330.
Ju, J. and Slingo, J. M., 1995, The Asian summer monsoon and ENSO, Q. J. R. Meteorol. Soc., 121, pp 1133-1168.
Kao, H. -Y, and J. -Y. Yu, 2009, Contrasting Eastern-Pacific and Central-Pacific Types of ENSO, Journal of Climate, 22 , pp 615-632.
Kogan, F. N., 1997, Global drought watch from space, Bull.Amer. Meteor. Soc., 78, pp 21-636.
Kogan, F.N., 1995. Droughts of the late 1980 s in the United States as derived from NOAA polar-orbiting satellite data. Bulletin of the American Meteorological Society 76(5):655-668.
Krishnamurti, T. N. and Bhalme, H.N., 1976, Oscillation of a monsoon system. Part I: Observational aspects, J. Atmos. Sci., 133, pp 1937-1954.
Krishnamurti, T.N., H.S. Bedi, and M. Subramaniam, 1989, The summer monsoon of 1987, Journal of Climate, 2 , pp 321-340.
Krishna Kumar, K. Rajagopalan, B., and Cane, M. A., 1999, On the weakening relationship between the Indian monsoon and ENSO, Science, 284, pp 2156-2159.
Kug, J., F. Jin, and S. -I, An, 2009, Two Types of El Nino Events: Cold Tongue El Nino and Warm Pool El Nino, 22 (6), pp 1499-1515.
Latif, M., R. Kleeman, and C. Eckert, 1997, Greenhouse warming, decadal variability, or El Nino? An attempt to understand the anomalous 1990s, J. Climate, 10, pp 2221-2239.
Lloyd-Hughes, B., and M. A. Saunders, 2002: A drought climatology for Europe. Int. J. Climatol., DOI: 10.1002/joc.846.
McKee T. B., Doesken N. J., Kliest, J. 1993. The relationship of drought frequency and duration to time scales, In Proceedings of the 8th Conference on Applied Climatology, 17-22 January, Anaheim, CA. American Meteorological Society: Boston, MA; 179-184.
Mishra, A.K., Singh, V.P., 2010, A review of drought concepts, Journal of Hydrology, 391, pp 202-216, doi:10.1016/j.jhydrol.2010.07.012.
Niranjan Kumar, K. Rajeevan, M. Pai, D.S. Srivastava, A.K. Preethi, B., 2013, On the observed variability of monsoon droughts over India, Weather and Climate Extremes, 42-50.
Obasi, G.O.P.,1994, WMO’s role in the International Decade for Natural Disaster Reduction, Bulletin of the American Meteorological Association, 75(9): 1655-1661.
Oladipio EO. 1985. A comparative performance analysis of three meteorological drought indices. International Journal of Climatology, 5, pp 655-664.
Ose, T., Song, Y. and Kitoh, A., 1997, Sea surface temperature in the south China Sea and index for the Asian monsoon and ENSO system, J. Meteorol. Soc., Japan, 75,pp 1091-1107.
Pai, D.S., Latha Sridhar, and M.R., Ramesh Kumar, 2015, Active and break events of Indian summer monsoon during 1901-2014, Clim Dyn, DOI:10.1007/s00382-015-2813-9.
Pai, D.S., Latha Sridhar, P., Guhathakurta, Hatwar, H.R., 2011, District-wide drought climatology of the southwest monsoon season over India based on standardized precipitation index (SPI), Natural Hazards, 59, pp 1797-1813, doi:10.1007/s11069-011-9867-8.
Pai, D. S., 2004, A Possible Mechanism for the Weakening of ElNino-Monsoon Relationship during Recent Decade, Meteorol. Atmos. Physics, V86, pp 143-157.
Palmer WC., 1965, Meteorological drought. Research Paper No. 45, US Weather Bureau: Washington, DC.
Palmer, W.C., 1968, Keeping track of crop moisture conditions, nationwide: The new Crop Moisture Index, Weatherwise, 21, pp 156-161.
Parthasarathy B, Munot AA, Kothawale DR, 1994, All-India monthly and seasonal rainfall series; 1871—1993, Theor Appl Climatol,49, pp 217—224.
Rajeevan, M., Jyoti Bhate, and Sulochana Gadgil, 2010, Active and Break Spells of the Indian Summer Monsoon, J.Earth Science, 229-247.
Ramdas, D.A., 1950, Rainfall and Agriculture, Ind. J. Met and Geophys, 1, pp 262- 274.
Rao Kusuma, G. and Goswami, B. N., 1988, Interannual variation of sea surface temperature over the Arabian Sea and the Indian monsoon, A new perspective, Mon. Wea. Rev., 116, pp 558-568.
Rao, R., B.V., Sastri, A.S.R.A.S., and Rama Krishna, Y.S., 1981, An Integrated Scheme of Drought Classification as Applicable to Indian Arid Region, IDOJARAS, 85, pp 317-22.
Rasmussen E. M. and Carpenter T. H., 1983,. The relationship between eastern equatorial Pacific sea surface temperature and rainfall over India and Sri Lanka, Monthly Weather Review., 110, pp 354 - 384.
Saji, N.H., B.N. Goswami, P.N. Vinayachandran, and T. Yamagata, 1999, A dipole mode in the tropical Indian Ocean, Nature, 401, pp360-363.
Sastri, A.S.R.A.S., 1993, Agricultural Drought Management Strategies to Alleviate Impacts: Examples from the Arid and Sub humid Regions of the Indian Subcontinent, in D.A. Wilhite (ed.), Drought Assessment, Management, and Planning: Theory and Case Studies, Kluwer Academic Publishers, Dordrecht, pp 65-86.
Sen, A.K. and K.C. Sinha Ray. 1997. Recent trends in drought affected areas in India. Presented at International Symposium on Tropical Meteorology, INTROPMET-1997 at IIT, New Delhi.
Sikka DR, 1980, Some aspects of the large scale fluctuations of summer monsoon rainfall over India in relation to fluctuations in the planetary and regional scale circulation parameters. Proc Ind Acad Sci (Earth and Planetary Sci) 89: 179-195.
Sinha Ray, K.C. and M.P. Shewale, 2001, Probability of occurrence of drought in various subdivisions of India, Mausam, 52, pp 541-546.
Sivakumar, M. V. K., R. Motha, D. Wilhite, and J. Qu, Eds., 2011, Towards a compendium on national drought policy: Proceedings of an expert meeting. ES87, World Meteorological Organization AGM-12, WAOB-2011, pp 135.
Smith, T.M., R.W. Reynolds, Thomas C. Peterson, and Jay Lawrimore, 2008, Improvements to NOAA's Historical Merged Land-Ocean Surface Temperature Analysis (1880-2006), Journal of Climate, 21, 2283-2296.
Soman, M.K., and Slingo, J.M., 1997, Sensitivity of the Asian summer monsoon to aspects of sea surface temperature anomalies in the tropical Pacific Ocean, Q. J. R. Meteorol. Soc., 123, pp 309-336.
Tate, E.L., J.R. Meigh, C. Prudhomme and M.P. McCartney., 2000, Drought assessment in Southern Africa using river flow data, DFID report 00/4, London, UK.
Vicente-Serrano, Sergio, M., Beguena, Santiago, Lopez-Moreno, JuanI., 2010a. A multi scalar drought index sensitive to global warming: the standardized precipitation evapotranspiration index. Journal of Climate, 23, pp 1696-1718.
Vicente-Serrano, Sergio,M., etal., 2010b. A new global 0.5 gridded dataset (1901- 2006) of a multi scalar drought index: comparison with current drought index datasets based on the Palmer Drought Severity Index, Journal of Hydrometeorology, 11, pp 1033-1043.
Webster, B. C. and Yang, S., 1992, Monsoon and ENSO: Selectively interactive systems, Q. J. Roy. Meteorol. Soc., 118, pp 877-926.
Webster, P. J., Magana, V. O., Palmer, T. N., Shukla, J., Tomas, R. A., Yanai, M. and Yasunari, T., 1998, Monsoons: Processes, Predictability, and the prospects for prediction, J. Geophys. Res., 103, pp 14451-14510.
Wilhite DA, Glantz MH., 1985, Understanding the drought phenomenon: the role of definitions. Water International, 10, pp 111 -120.
WMO, World Meteorological Organization, 2006, Drought monitoring and early warning: Concepts, progress and future challenges, WMO-No. 1006.
Yun, K.-S., K.-H. Seo, and K.-J. Ha, 2008,, Relationship between ENSO and northward propagating intraseasonal oscillation in the east Asian summer monsoon system, J. Geophys. Res., p 113, D14120, doi:10.1029/2008JD009901.