Greenhouse gas concentrations in the atmosphere hit new record highs in 2022, with no end in sight to the rising trend, according to this new report by the World Meteorological Organisation (WMO). This Bulletin represents the latest analysis of observations from the WMO GAW Programme. It shows globally averaged surface …
Long-term data on hourly wind speed from 70 meteorological centres of India Meteorological Department have been collected. The daily gust wind data have been processed for annual maximum wind speed (in kmph) for each site. Using the Gumbel probability paper approach the extreme value quantiles have been derived. A design …
A decrease in atmospheric methane levels might have triggered the progressive rise of atmospheric oxygen about 2.4 billion years ago, but the cause of this methane decrease remains uncertain. Kurt Konhauser and colleagues report a decline in the oceanic nickel-to-iron ratio about 2.7 billion years ago, which they attribute to …
Tricobalt tetraoxide (Co3O4) is a potential catalyst for low-temperature oxidation of carbon monoxide (required in automotive emission control) but although it is active even at subzero temperatures, it is highly sensitive to moisture. By forming Co3O4 into nanorods, Xiaowei Xie and colleagues make it more active and also stable in …
Fundamental to the onset of the Indian Summer Monsoon is the land-sea thermal gradient from the Indian Ocean to the Himalayas-Tibetan Plateau (HTP). The timing of the onset is strongly controlled by the meridional tropospheric temperature gradient due to the rapid pre-monsoon heating of the HTP compared to the relatively …
The question of how to assess trends in rainfall data is very relevant to that of climate change. A short review of prior work revealed that there was little consensus on the methodology to be adopted. Many methods had been tried and abandoned. Some methods had found comparatively wide acceptance …
The quantification of the carbon dioxide emissions impact associated with land-use change for biofuels production is complicated by the fact that the carbon costs from land-use change and the avoided emissions from substituting biofuels for fossil fuel in transport occur over an extended period of time. Estimating the net carbon …
Predicted or confronting you out of the blues, bad weather can give anybody the jitters, especially when each of your business moves, right from the stage of planning to that of execution, will have to be weighed against the vagaries of weather and climatic changes. Not surprisingly, demand for intelligent, …
Urbanization has a dynamic relationship with the physical environment. Urban and rural environments differ substantially in their microclimate. These climatic differences are primarily caused by the alteration on the surface of earth by human constructions and the release of artificially created energy into the environment. Inadvertent climate changes induced by …
Total atmospheric moisture content present in the atmosphere is less than 1% of total atmospheric composition. The atmospheric moisture variability accounts for nearly 10% variation in global hydrological cycle. The atmospheric moisture variability occurs in the form of cloud cover and hence in to the precipitation. A prior knowledge of …
Each year, on 23 March, the World Meteorological Organization, its 188 members and the worldwide meteorological community celebrate World Meteorological Day around a chosen theme. This day commemorates the entry into force, on that date in 1950, of the WMO Convention creating the Organization. Subsequently, in 1951, WMO was designated …
Net primary production (NPP) in the Yellow River Basin, China, during 1982-1999 was estimated with the CASA model using satellite data. The yearly NPP (NPPt) tended to increase during 1982-1999 throughout the Yellow River Basin. A large mean annual NPP for each grid cell was indicated in both the upper …
During a special ceremony at the Palais des Nations in Geneva, Switzerland, the World Meteorological Organization (WMO) and the International Council for Science released a report titled
Ozone pollution is produced by photochemical processes involving nitrogen oxides and volatile organic compounds in the lower atmosphere. Ozone levels become particularly high in regions close to high ozone precursor emissions during summer episodes with stagnant meteorological conditions, when high insolation and temperatures persist. In 2008, levels continued to exceed …
conservation Fishing casualties Fishing has dwindled the numbers of the pantropical spotted dolphin, a Pacific Ocean inhabitant, at a worrying rate. Initially the cause was traced to
This latest WMO statement contains information for 2008 on global temperature, regional temperature anomalies, global precipitation, droughts, flooding and storms, La Ni
Carbon dioxide emissions and their associated warming could linger for millennia, according to some climate scientists. Mason Inman looks at why the fallout from burning fossil fuels could last far longer than expected. After our fossil fuel blow-out, how long will the CO2 hangover last? And what about the global …
