Impact of El Nino and La Nina events on climatic conditions and rice-wheat productivity in Punjab

Simple item page
dc.contributor.advisorDhaliwal, L.K.
dc.contributor.authorChand, Shivani
dc.date.accessioned2019-07-09T11:13:05Z
dc.date.available2019-07-09T11:13:05Z
dc.date.issued2019
dc.description.abstractAgriculture in India is mostly rainfed and is greatly influenced by Indian Summer Monsoon Rainfall (ISMR). It contributes to about 75 per cent of the total annual rainfall. El Nino, a phenomenon during which unusually warm water appears in the eastern Pacific Ocean has inverse relation with Indian summer monsoon rainfall. The historical data of different meteorological parameters (maximum temperature, minimum temperature, relative humidity, sunshine hours and rainfall) for different locations of Punjab viz. Amritsar (1971-2017), Ballowal Saunkhri (1984-2018), Bathinda (2001-2018), Ludhiana (1971-2018) and Patiala (1971-2018) were collected from the Department of Climate Change and Agricultural Meteorology, PAU, Ludhiana and Met Centre, India Meteorological Department. The rice-wheat productivity data were collected from indiastat.com and Statistical Abstract of Punjab. The data related to groundwater table (1998-2017) were collected from the Central Ground Water Board, Punjab. The El Nino/ La Nina events data were retrieved from Golden Gate Weather Services.The decade wise monthly analysis of maximum temperature showed increasing trend at Ballowal Saunkhri, Ludhiana and Patiala during all months except January, June and September whereas at Amritsar and Bathinda decreasing trend was observed in most of the months. The minimum temperature was found to be increasing at all the locations. The mean relative humidity showed increasing trend at Amritsar, Ballowal Saunkhri, Bathinda and Patiala whereas at Ludhiana few months showed negative mean relative humidity. The increasing trend in rainfall was observed at Amritsar and Ludhiana during all months except May, July, November and December whereas Ballowal Saunkhri and Patiala showed decreasing trend in most of the months. Inter season rainfall variability during kharif season mostly occurred in El Nino years at all locations except at Ballowal Saunkhri. The heavy rainfall events occurred more frequently compared to very heavy and extremely heavy rainfall events at different locations. Intra season rainfall variability between different seasons was highest during post monsoon season followed by pre monsoon season. Drought indices standardized precipitation index (SPI) and aridity index (AI) were calculated. SPI showed that El Nino year was more related with annual and kharif deficit years. Aridity index showed that El Nino years were warm and dry compared to La Nina and neutral years and in recent years Ballowal Saunkhri showed shift towards warm and dry conditions. The ground water table level showed significant decrease at different locations of Punjab. The relationships between groundwater table and rainfall indicated that continuous deficit rainfall years led to decline in groundwater table. The correlation between wheat grain yield and diurnal range of temperature was negative at all the locations except at Ballowal saunkhri.en_US
dc.identifier.urihttp://krishikosh.egranth.ac.in/handle/1/5810113501
dc.keywordsEl Nino, La Nina, standardized precipitation index, aridity index, groundwater table, rice, wheaten_US
dc.language.isoenen_US
dc.pages163en_US
dc.publisherPunjab Agricultural University, Ludhianaen_US
dc.research.problemImpact of El Nino and La Nina events on climatic conditions and rice-wheat productivity in Punjaben_US
dc.subAgricultural Meteorologyen_US
dc.subjectnullen_US
dc.themeImpact of El Nino and La Nina events on climatic conditions and rice-wheat productivity in Punjaben_US
dc.these.typePh.Den_US
dc.titleImpact of El Nino and La Nina events on climatic conditions and rice-wheat productivity in Punjaben_US
dc.typeThesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
Shivani dissertation after viva 13.6.2019.pdf
Size:
1.29 MB
Format:
Adobe Portable Document Format
Description:
Ph.D
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Thesis