Climate

Annual climate summary 2023

The report discusses the climate condition over Indian region during the year 2023. Notably, global temperatures soared to exceptionally high levels during this period (WMO.No.1347). The India Meteorological Department continuously monitors weather and climate over Indian region. The annual mean land surface air temperature averaged over India during 2023 was …

Intensified Arabian Sea tropical storms

Tropical cyclones over the Arabian Sea in the pre-monsoon season (May–June) have intensified since 1997 owing to significant reductions in storm-ambient vertical wind shear (VWS) in the troposphere; these reductions have decreased on average by about 3 m s−1 from the pre-1997 epoch (1979–1997) to the recent epoch (1998–2010)1. The …

Afternoon rain more likely over drier soils

Analysis of observations on six continents reveals a global preference for afternoon rain to fall on locally drier soils—contrary to the predictions of large-scale climate models, and suggesting that such models may exaggerate the occurrence of droughts.

Brown carbon and internal mixing in biomass burning particles

Biomass burning (BB) contributes large amounts of black carbon (BC) and particulate organic matter (POM) to the atmosphere and contributes significantly to the earth’s radiation balance. BB particles can be a complicated optical system, with scattering and absorption contributions from BC, internal mixtures of BC and POM, and wavelength-dependent absorption …

Impacts of megacities on air pollution and climate

The World Meteorological Organization (WMO) and the International Global Atmospheric Chemistry (IGAC) project have released a report, titled “Impacts of Megacities on Air Pollution and Climate.” The report provides an initial assessment of available information on air pollution and climate impacts in megacities globally. The report concludes that, unless city …

Monsoon prediction: are dynamical models getting better than statistical models?

The Indian summer monsoon rainfall (ISMR) has remained remarkably stable during the last 140 years. The ISMR has varied between 70% and 120% of the long-term average of about 85 cm. Monsoon seasons with ISMR of less than 90% of the average are considered to be droughts, whereas those with …

‘Unesco tag can help prevent rich natural resources in W ghats’

Save natural resourses to next generation, suggests Suresh Heblikar The rich natural resources available in the Western Ghats belt in the State could be preserved with the help of UNESCO heritage tag to the ghats, opined environmentalist Suresh Heblikar. Addressing media persons, in the town on Thursday after participating in …

Sensitivity of groundwater recharge using climatic analogues and HYDRUS-1D

The sensitivity of groundwater recharge to different climate conditions was simulated using the approach of climatic analogue stations, i.e. stations presently experiencing climatic conditions corresponding to a possible future climate state. The study was conducted in the context of a safety assessment of a future near-surface disposal facility for low …

Impact of intensified Indian Ocean winds on mesoscale variability in the Agulhas system

South of Africa, the Agulhas ocean current system transports warm, salty water from the Indian Ocean to the Atlantic Ocean. This study shows that the mesoscale variability of the Agulhas system has intensified over recent decades, apparently owing to enhanced trade winds over the tropical Indian Ocean.

Endangered waters: impacts of coal-fired power plants on water supply

This new report released by Greenpeace has found that large clusters of coal fired power plants proposed in Vidarbha may bring down the future availability of water in the Wardha river by 40% and affect irrigation for about 1 lakh hectares of farmland in the future. In the backdrop of …

Feeding a thirsty world: challenges and opportunities for a water and food secure future

This report presents the latest thinking and new approaches to emerging and persistent challenges to achieve food security in the 21st century. It focuses on critical issues that have received less attention in the literature to date, such as: food waste, land acquisitions, gender aspects of agriculture, and early warning …

Statistical abstract of Delhi 2012

The present Statistical Abstract 2012 is the Sixth in a series brought out by this Directorate on the basis of secondary data sources. The uniqueness of Statistical Abstract is that it contains time series data on various socio-economic parameters and serves as an effective quantitative tool for reaching to logical …

Ending the reign of fluorocarbons, answering the call on climate

An EIA (Environmental Investigation Agency) report to the 32nd meeting of the Open-Ended Working Group of the Parties to the Montreal Protocol on Substances that Deplete the Ozone Layer.

City to get 5,000 new toilets soon

The Chennai Corporation will install a total of 5,000 newly designed toilets in its 15 zones. The toilets will be constructed under public-private partnership mode and the rights of advertisement on the space available in such toilets will be made available to the private entity that sets up the toilet. …

Advances in developing a climate based dengue outbreak models in Dhaka, Bangladesh: challenges & opportunities

Dengue is a vector borne disease transmitted by Aedes aegypti and Ae. albopictus. The incidence of the disease is increasing worldwide and currently 40 per cent of the global population is at risk of the infection. The number of cases in the WHO Southeast Asia region surged nearly 70 per …

Climatic factors influencing dengue cases in Dhaka city: a model for dengue prediction

Transmission of dengue virus depends on the presence of Aedes mosquito. Mosquito generation and development is known to be influenced by the climate. This study was carried out to examine whether the climatic factors data can be used to predict yearly dengue cases of Dhaka city, Bangladesh.

Approaching a state shift in Earth’s biosphere

Localized ecological systems are known to shift abruptly and irreversibly from one state to another when they are forced across critical thresholds. Here we review evidence that the global ecosystem as a whole can react in the same way and is approaching a planetary-scale critical transition as a result of …

A new atlas of temperature and salinity for the North Indian Ocean

The most used temperature and salinity climatology for the world ocean, including the Indian Ocean, is the World Ocean Atlas (WOA) (Antonov et al 2006, 2010; Locarnini et al 2006, 2010) because of the vast amount of data used in its preparation. The WOA climatology does not, however, include all …

Godrej to manufacture climate-friendly ACs

The new air conditioners have been designed on the basis of European and International safety standards Godrej Appliances today said it has started manufacturing the world's first ozone and climate-friendly air-conditioners, Godrej EON Green Balance, range of five star air conditioners. "We are delighted to be the first one to …

Fading green cover leaves city gasping for breath

Sheer apathy on the part of the local authorities towards preserving the green cover and the lack of clarity on felling of trees in public places threaten gradual degeneration of shade trees making the city hotter by the day. The difference that shade trees could bring to surroundings could be …

The Thar Desert and its antiquity

For long, widely divergent views (based on isolated pieces of historical evidence or broad geological evolution of the subcontinent, notably the rise of the Himalayas in mid-late Miocene), had prevailed regarding origin and antiquity of the Thar Desert. Studies of the past few decades have since provided a wealth of …

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