Solar Radiation

Ozone and UV bulletin

The stratosphere ozone layer is slowly recovering and the recovery will be complete in most parts of the atmosphere in the coming decades, according to the latest bulletin by the World Meteorological Organization (WMO). The bulletin with the updated status of the ozone layer by WMO-Global Atmosphere Watch bulletin returned …

Saving the environment: Researchers use Google Street View to map ecosystem

Since its inception Google has been serving mankind - right from the simplest things to the most complex tasks of finding facts and details of specific subjects. With its ever-evolving technology, Google's contributions to society are huge. Similarly, the Internet search giant has been used to help protect and conserve …

Decadal-scale relationship between measurements of aerosols, land-use change, and fire over Southeast Asia

A simultaneous analysis of 13 years of remotely sensed data of land cover, fires, precipitation, and aerosols from the MODIS, TRMM, and MISR satellites and the AERONET network over Southeast Asia is performed, leading to a set of robust relationships between land-use change and fire being found on inter-annual and …

Wind-solar hybrid energy production analysis report

This report focuses on integrated hybrid renewable energy projects consisting of wind and solar energy. Ministry of New and Renewable Energy directed National Institute of Wind Energy, Chennai to prepared a report on hybrid wind and solar energy production analysis. NIWE, has chosen 24 wind potential sites based on met-masts …

Wind-solar hybrid energy production analysis report

This report focuses on integrated hybrid renewable energy projects consisting of wind and solar energy. Ministry of New and Renewable Energy directed National Institute of Wind Energy, Chennai to prepared a report on hybrid wind and solar energy production analysis. NIWE, has chosen 24 wind potential sites based on met-masts …

Jharkhand loses steam for Solar power purchase agreements

Developers who won an auction of solar project contracts in Jharkhand are still waiting for the state’s government-run electricity distributor to sign power purchase agreements (PPAs), six months after they emerged the successful bidders. The March auction, with contracts for 1,200 MW of projects in 45 places up for grabs, …

Comparing multiple model-derived aerosol optical properties to collocated ground-based and satellite measurements

Anthropogenic aerosols are a key factor governing Earth’s climate, and play a central role in human-caused climate change. However, because of aerosols’ complex physical, optical, and dynamical properties, aerosols are one of the most uncertain aspects of climate modeling. Fortunately, aerosol measurement networks over the past few decades have led …

A methodology to estimate solar radiation for design of thermally efficient buildings

Sustainable development of Indian cities is an essential pre-requisite for India to establish itself as a major economic power. Smart cities dwell on energyefficient urban centres. The National Action Plan on Climate Change and the recently formulated plan for Smart Cities emphasize the need for energy efficiency. However, inadequate domestic …

Urbanization effect on sunshine duration during global dimming and brightening periods in China

There is an ongoing debate on whether the observed decadal variations in surface solar radiation, known as "dimming and brightening", are a global or just local phenomenon. We investigated this issue using a comprehensive set of long-term sunshine duration records from China, which experienced a rapid growth in urbanization during …

Thousands of new cancer cases in Ontario each year due to environmental exposures

Between 3,540 and 6,510 new cancer cases in Ontario each year result from environmental factors, says a new report from Cancer Care Ontario and Public Health Ontario (PHO). The report, Environmental Burden of Cancer in Ontario, estimates how many new cancer cases occur each year in the province as a …

Evidence for climate change in the satellite cloud record

Clouds substantially affect Earth’s energy budget by reflecting solar radiation back to space and by restricting emission of thermal radiation to space. They are perhaps the largest uncertainty in our understanding of climate change, owing to disagreement among climate models and observational datasets over what cloud changes have occurred during …

Variations in the cloud-base height over the central Himalayas during Ganges Valley Aerosol experiment: association with the monsoon rainfall

We present the measurements of cloud-base height variations over ARIES, Nainital (79.45°E, 29.37°N, 1958 m amsl) obtained from Vaisala Ceilometer, during the nearly year-long Ganges Valley Aerosol Experiment (GVAX). Original Source

New early-warning system could protect Earth from explosive space weather

The sun can erupt with flares more energetic than 30 billion times the yield of all nuclear weapons ever detonated. The energetic particles released by solar flares tunnel a path through our inner solar system with speeds regularly exceeding 6 million kph. If the Earth is unfortunate enough to sweep …

Direct radiative effect by brown carbon over the Indo-Gangetic Plain

The importance of light-absorbing organic aerosols, often called brown carbon (BrC), has become evident in recent years. However, there have been relatively few measurement-based estimates for the direct radiative effect of BrC so far. In earlier studies, the AErosol RObotic NETwork (AERONET)-measured aerosol absorption optical depth (AAOD) and absorption Angstrom …

An increase in aerosol burden and radiative effects in a warmer world

Atmospheric aerosols are of significant environmental importance, due to their effects on air quality, as well as their ability to alter the planet’s radiative balance. Recent studies characterizing the effects of climate change on air quality and the broader distribution of aerosols in the atmosphere show significant, but inconsistent results, …

Global dimming and urbanization: did stronger negative SSR trends collocate with regions of population growth?

Global dimming refers to the decrease in surface solar radiation (SSR) observed from the 1960s to the 1980s at different measurement sites all around the world. It is under debate whether anthropogenic aerosols emitted from urban areas close to the measurement sites are mainly responsible for the dimming. In order …

Temperature rise more in winter months than in summer

The warmth of winter months has increased significantly over the past 100 years. Data of the India Meteorological Department (IMD) for the past 114 years revealed that the increase in temperature had been more in the winter months than those of summer. The highest rise in maximum temperature has been …

Impacts of wind stilling on solar radiation variability in China

Solar dimming and wind stilling (slowdown) are two outstanding climate changes occurred in China over the last four decades. The wind stilling may have suppressed the dispersion of aerosols and amplified the impact of aerosol emission on solar dimming. However, there is a lack of long-term aerosol monitoring and associated …

All-sky direct radiative effects of urban aerosols in Beijing and Shanghai, China

Aerosol particles can directly alter the radiation balance by scattering and absorbing incident solar radiation, thus decreasing the amount of light reaching the surface and increasing the fraction of diffuse radiation—the so-called ‘aerosol direct radiative effect’. Using the Moderate Resolution Imaging Spectroradiometer aerosol products, the aerosol direct radiative effects under …

ARIES, Nainital: a strategically important location for climate change studies in the Central Gangetic Himalayan region

ARIES, acronym for Aryabhatta Research Institute of Observational Sciences, located in the Central Gangetic Himalayan (CGH) region is emerging as one of the unique sites for climate change studies. The long-term, in situ, precise measurements of aerosols and trace gases obtained from this region provide valuable inputs for climate studies. …

Modelled and observed changes in aerosols and surface solar radiation over Europe between 1960 and 2009

Substantial changes in anthropogenic aerosols and precursor gas emissions have occurred over recent decades due to the implementation of air pollution control legislation and economic growth. The response of atmospheric aerosols to these changes and the impact on climate are poorly constrained, particularly in studies using detailed aerosol chemistry–climate models. …

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