Make This Your Homepage   •   Bookmark Us   •   Download our Toolbar  
India Education Diary : Eden of Education
Home Admission Application Forms Edu Policy Scholarship Exam Notifications Competitions Exam Results Edu Jobs Job
Flip-Flop of Diurnal and Seasonal Surface Urban Heat Island Intensity in India

Tuesday, January 10, 2017
Email Story   Feedback   Print Story
Mumbai: The difference between the land surface temperature (LST) of urban regions and that of adjacent non-urban regions, termed Surface Urban Heat Island Intensity (SUHII), is commonly believed to be positive, from solar radiation absorption by urban concrete structures. A recent study, using a 13 year land surface temperature record from satellite sensors, has revealed an unexpected negative SUHII over a majority of Indian cities during March to May daytime, as well as, a reversal in the sign of SUHII between day-night and summer-winter. The study, published in Scientific Reports (Nature Publishing Group), is performed by Prof. Subimal Ghosh, Prof. Chandra Venkataraman and their doctoral students Hiteshri Shastri, Beas Barik and Pankaj Sadavarte of the Inter-Disciplinary Program in Climate Studies, Indian Institute of Technology Bombay (IITB).
During March to May daytime, a negative SUHII was found to occur over majority of cities in interior India, indicating cooler urban land surface than adjacent non-urban land surface, opposite to common expectation of a positive SUHII. This was attributed to lower vegetation cover over non-urban than urban regions, detected by satellite, leading to higher evapo-transpiration and latent heat fluxes from urban regions, with subsequent decrease in their land surface temperatures.  Interestingly, the sign of the SUHII switched to positive during nighttime, from the cessation of evapo-tranpiration cooling and thermal storage in urban concrete structures. Further, during December to February, vegetation cover was found to be greater over non-urban than contiguous urban regions, resulting in evaporative cooling of the former, therefore higher urban land temperature and positive SUHII. Further, during winter, higher emissions of radiation absorbing pollution particles, containing black carbon, from biomass burning for cooking and heating, in urban regions with high population density, could result in warming surface air, with possible positive feedback to land surface temperature. Thus, seasonal and diurnal patterns in the sign of SUHII were linked to seasonal conversion of barren land to crop land in non-urban regions in winter, while links to seasonally varying black carbon emissions need further study.
The implications of this work are that, during March to May, when land surface temperature is at its annual maximum, the intensities of daytime heat-waves could be higher in majority of non-urban regions in India, compared to those in adjacent urban regions. This is in contrast to common understanding of urban vs non-urban climate and SUHII in tropical regions around the world. Increasing availability of public health facilities to combat health hazards from heat waves, in non-urban regions, must be considered seriously as part of disaster mitigation policy in India. 
 
Email Story   Feedback   Print Story

 
Admission Notifications
GET LATEST ADMISSION NOTIFICATION
Avantika University opens admissions for its Design and Engineering programs
Les Roches Global Hospitality Education Invites Applications for Bachelor Programmes 2017
The Oberoi Group opened online applications for selection of students for its Systematic Training and Education Programme or STEP
Whistling Woods International Announces the First Round of Entrance Exam for July 2017 Intake
Missouri State University, US, announces admissions for Bachelors of Science in Mechanical Engineering Technology
The University of Sheffield, UK is inviting applications for BA Urban Studies course
Missouri State University extends deadline for receiving applications for Spring 2017 (January) to Nov 1

 
Exam/Test Alert
GET LATEST EXAM/TEST ALERT
Delhi Judicial Service Examination; Apply now
NCHM JEE 2016: Apply by April 11
SBVU PG Ent. Test 2015
Bridge Program at NIFT: Apply by Oct 10
IUCAA-NCRA Admission Test (INAT-2014)
Combined Med Services Exam 2014
DNB PDCET July 2014: Exam on June 18

Top Stories
  Latest News from
State   National   World   Edu Business
  Next Tech Lab from SRM University Wins IESA Hackathon - Vision Summit 2017 (Tamil Nadu)
  Child Rights and You - CRY receives support from Sourav Ganguly for the Girl Child (West Bengal)
  Gurgaon Schools Conduct Sessions for Students to Stay-Stress Free During Exam (Haryana)
  Navneet Education launches portal for MHT-CET aspirants (Maharashtra)
  Sanjay Ghodawat International School, Kolhapur contributes Rs. 3,40,000 to Habitat for Humanity India (Maharashtra)
More : State News
  Professor G. Raghuram takes charge as Director of IIM Bangalore
  Making strides in Education from India to Ethiopia
  President of India calls upon Shri Ram College of Commerce to set itself higher benchmarks of excellence
  Flipkart and Microsoft forge cloud partnership to expand e-commerce in India
  BML Munjal University and Siemens join hands to open a Centre of Excellence
More : National News

  Latest News from
Universities   IIMs   IITs   Edujobs

Type of studies Edu Bodies Career Options/counseling Exam result/alert Others
Medical Medical
Engineering Engineering
Computer Computer
Law Law
Humanities Humanities
Vocational Education Vocational Education
Correspondence Courses Correspondence Courses
Online Education Online Education
Distance Education Distance Education
Statutory Bodies Statutory Bodies
IIMs IIMs
IITs IITs
Universities Universities
Boarding school in India Boarding school
Career Options Career Options
Career Counselling Career Counselling
Coaching Coaching
Interview tips Interview tips
Resume Making Resume Making
Study Aboard Study Aboard
Entrance Exams Entrance Exams
Competitive Exams Competitive Exams
Civil Services Exams Civil Services Exams
Foreign Entrance Exam Foreign Entrance Exam
Scholarship Scholarship
Exam Result Exam result
Exam Alert Exam Alert
Admission Admission
Notifications Notifications
Top colleges Top colleges
Top Universities Top universities
Kids Corner Kids Corner
Schools Schools
Tender Tender
Edu Loans Edu Loans
Awards Awards
Top Job Sector Top Job Sector
About Us | Feedback | Advertise with us | PR Newswire | Contact us
India Education Diary | Business Diary | District Diary | National News | Edu Business News | Edu Events | Universities News | Image Galary | Press Release | Article
Copyright © by www.IndiaEducationDiary.com All rights reserved.