This joint WFP and Action Against Hunger publication presents the impacts of El Niño in LAC, highlighting the emergency response and resilience activities taken to mitigate the effect of climate shocks in the region. The publication underscores the significance of adequate anticipation, preparedness, and response to climate emergencies in LAC. …
This year is on track to be about the 10th warmest globally since records began in 1850 but gaps in Arctic data mean the world may be slightly underestimating global warming, a leading scientist said on Tuesday. A natural cooling of the Pacific Ocean known as La Nina kept a …
Climate models suggest that extreme precipitation events will become more common in an anthropogenically warmed climate. However, observational limitations have hindered a direct evaluation of model-projected changes in extreme precipitation. We used satellite observations and model simulations to examine the response of tropical precipitation events to naturally driven changes in …
It is thought, that the Northern Hemisphere experienced only ephemeral glaciations from the Late Eocene to the Early Pliocene epochs (about 38 to 4 million years ago), and that the onset of extensive glaciations did not occur until about 3 million years ago. Several hypotheses have been proposed to explain …
Of the dozens of forecasting techniques proffered by government, academic, and private-sector climatologists, all but two are virtually worthless, according to a new study.
Global Warming-Linked Showers May Lead To Flooding Washington: US and British researchers have confirmed the link between warmer climate and an increase in powerful rainstorms, according to a study that underscores one of the challenges of global warming. The researchers even found that the increase of extreme rainfall was higher …
the Indian Meteorological Department (imd) has predicted a normal monsoon for this year. But such predictions are known to fail often. A recent study says predictions fail because most models do not take into account temperatures in the Atlantic Ocean. imd's prediction models, among other things, focuses on the El …
Interannual variations in CO2 exchange across Amazonia, as deduced from atmospheric inversions, correlate with El Nino occurrence. They are thought to result from changes in net ecosystemexchange and fire incidence that are both related to drought intensity. Alterations to net ecosystemproduction (NEP) are caused by changes in gross primary production …
In 2005, southwestern Amazonia experienced the effects of an intense drought that affected life and biodiversity. Several major tributaries as well as parts of the main river itself contained only a fraction of their normal volumes of water, and lakes were drying up. Analyses of climatic and hydrological records in …
Sub-seasonal rainfall fluctuations, characterized as active and weak spells during the Indian monsoon season (June to September) is an important component of the variability of the Indian monsoon rainfall. In this paper, we suggest criteria for identification of active and break events of the Indian summer monsoon on the basis …
The forest biome of Amazonia is one of Earth's greatest biological treasures and a major component of the Earth system. This century, it faces the dual threats of deforestation and stress from climate change. In this article, the authors summarize some of the latest findings and thinking on these threats, …
In 1971, meteorologists Roland Madden and Paul Julian studied weather data from near equatorial Pacific islands. To their surprise, tropospheric winds, pressure and rainfall oscillated with a period of about 40 to 50 days. The oscillation in clouds and precipitation trends to be confined to the tropical Indian and Pacific …
Global warming has been a debatable subject of recent years, of which Dehra Dun is not an exception. This year, 2007, has experienced the hottest 26th January in last 77 years.
The concept of an interannually varying Indian summer monsoon season is introduced here, considering that the duration of the primary driving of the Indian monsoon - the large-scale meridional gradient of the deep tropospheric heat source - may vary from one year to another. Onset (withdrawal) is defined as the …
Some teleconnections studies between the monsoon rainfall over four meteorological subdivisions namely, plains of west U.P., East U.P., Bihar Plains and Gangetic West Bengal, thus constituting an area of U.P., adjoining Bihar and West Bengal and different thickness anomaly and geopotential heights over several levels in the troposphere over India …
scientists claim to have solved the mystery of links between El Nino and monsoons in India, a development that can lead to more accurate weather forecasts. This was published online in Science's portal on September 7, 2006. El Nino, which means
a vast system of winds over the Pacific Ocean is getting weak due to global warming, which portends ill for worldwide weather systems, including the Indian monsoon, claims a recent study. A team of us researchers from the University Cooperation for Atmospheric Research (ucar) in Colorado has found that the …
