Sentences with phrase «african monsoon»

The diurnal cycle of lower boundary - layer wind in the West African monsoon.

As temperatures rise, the risks increase that vulnerable elements of the climate system — the polar ice sheets, the Amazon rainforest, West African monsoon, and others — will cross critical thresholds, or tipping points.

Several vulnerable elements in the climate system, such as continental ice sheets, Amazon rainforest, West African monsoon, and others, could be pushed towards abrupt or irreversible change if warming continues in a business - as - usual way throughout this century.

It is possible that changes to the West African monsoon could lead to greening of the Sahara / Sahel; a rare example of a beneficial potential tipping point.

Palaeo - records indicate that both the Indian Summer Monsoon and West African Monsoon have shifted in the past, causing large changes in rainfall and vegetation.

As well as the complexity of the West African Monsoon, researchers are looking at the drivers of seasonality for East African rainfall, for example as part of the HyCRISTAL project.

There is still legitimate debate on how to best interpret d18O records in the tropics, how to best interrogate the cloud feedback problem given our limitations, the role of mesoscale convective systems in climate, the most realistic response of the African Monsoon to climate change, the evolution of the forcing pattern at the PETM, or the possible climates that can exist on extrasolar planets, etc..

In the Sahel the onset of desertification involved an interplay between the position of the West African Monsoon

In the tropics, an increase in precipitation is projected by the end of the 21st century in the Asian monsoon and the southern part of the West African monsoon with some decreases in the Sahel in northern summer (Cook and Vizy, 2006), as well as increases in the Australian monsoon in southern summer in a warmer climate (Figure 10.9).

This inconsistency of the rainfall projections may be related to AOGCM biases, or an unclear relationship between Gulf of Guinea and Indian Ocean warming, land use change and the West African monsoon.

65 J. Kutzbach, G. Bonan, J. Foley, S. P. Harrison, «Vegetation and soil feedbacks on the response of the African monsoon to orbital forcing in the early to middle Holocene,» Nature 384:623 - 626 (19 December 1996).

Anthropogenic climate change contributes to fanning of the West African monsoon by moisture from the Mediterranean July 13, 2016 Climate change can have mixed consequences: It would appear that the warming of the Mediterranean region, which has brought greater heat and drought to the countries there for around 20 years, is behind an increase in rainfall in the Sahel region.

The current paper is an example of how inertial instability can be used to explain the seasonal behavior of the African monsoon system.

This increases precipitation during the summer African monsoon season.

Cook, K. H., 2015: Role of inertial instability in the West African monsoon jump.

Researchers used a regional climate model to study links between a streak of cooler water in the tropical Atlantic during spring to the timing and intensity of West African monsoon rains.

The inability of global climate models to match the timing or placement of short - term or regional precipitation patterns such as the West African monsoon may be alleviated by «downscaling» to use smaller scale climate models with increased area resolution.

Several studies have suggested that fluctuations in the surface temperature of the North Atlantic Ocean are partly responsible for shifts in the African monsoon.

Roehrig, R., D. Bouniol, F. Guichard, F. Hourdin, and J. Redelsperger (2013), The present and future of the West African monsoon: a process - oriented assessment of CMIP5 simulations along the AMMA transect..

Research indicates that the Arctic had substantially less sea ice during this period compared to present Current desert regions of Central Asia were extensively forested due to higher rainfall, and the warm temperate forest belts in China and Japan were extended northwards West African sediments additionally record the «African Humid Period», an interval between 16,000 and 6,000 years ago when Africa was much wetter due to a strengthening of the African monsoon While there do not appear to have been significant temperature changes at most low latitude sites, other climate changes have been reported.

West African Monsoon Climate Modeling Location: NASA Goddard Institute for Space Studies Dr. Charles Ichoku

The researchers talk of «a northward expansion of the West African monsoon domain.»

The climatic stress facing the poor countries of West Africa is not fundamentally different from the climatic stress facing the states of the southwest U.S., namely, less water availability for their burgeoning populations, the former through natural and human - induced variations in the WAM (West African Monsoon) and the latter from natural and human - induced variations in the snowpacks in the Sierra Nevada and Rocky mountains.

Oman, Luke, Alan Robock, Georgiy L. Stenchikov, and Thorvaldur Thordarson, 2006: High - latitude eruptions cast shadow over the African monsoon and the flow of the Nile.

Chelliah and Bell (2004) defined a tropical multi-decadal pattern related to the AMO, the PDO and winter NAO with coherent variations in tropical convection and surface temperatures in the West African monsoon region, the central tropical Pacific, the Amazon Basin and the tropical Indian Ocean.

Amazon rainforest, West African monsoon and others) could be pushed towards abrupt or irreversible change if warming continues in a business - as - usual way throughout this century.

Other hurricane - friendly climate factors this year include ENSO - neutral conditions (no El Niño or La Niña) in the Pacific Ocean, warmer than average waters in the tropical Atlantic, and a stronger - than - average West African monsoon.

At the heart of the unrest were starvation and famine in the Ptolemaic Kingdom, where grain harvests were critically dependent on annual flooding of fertile plains by the East African monsoon.

To do this, they used a variety of data, such as fuel consumption questionnaires submitted to the authorities of various countries, field surveys, and the results of research programs such as AMMA (West African Monsoon program) and POLCA (African Capitals Pollution program).

Toward the end of the Green Sahara, the Northern Hemisphere was farther from the sun and the West African monsoon was weaker.

Warmer summers strengthened the West African monsoon and delivered more rain.

During this time, rainfall was affected by the African monsoon which strengthened and weakened on a 23,000 year cycle driven by the precession of the equinoxes.

The greening of Sahara strengthens the West African Monsoon, which triggers a change in the atmospheric circulation over the entire tropics, affecting tropical cyclone activity.

Over the past several years, scientists from many institutions have explored the ability of SP - CAM to simulate tropical weather systems, the day - night changes of precipitation, the Asian and African monsoons, cloud - aerosol interactions and other climate phenomena.

Changes in the Arctic air flow could result in changes to the Indian and east African monsoons, El Ninos, and the ITCZ.

Now, however, climatologists have discovered that changing oceanic temperatures and irregular African monsoons have most likely caused the drought, not local populations.

The deliberately exaggerated nature of some early simulations produced exaggerated modeling results, including significant changes in regional rainfall such as disruptions to Asian and African monsoons.

Evidence for the presence of a coupled atmospheric forcing for the Indian and East African monsoons on a centennial time scale is also seen.»

Relations between climate variability in the Mediterranean region and the tropics: ENSO, South Asian and African monsoons, hurricanes and Saharan dust

Climate models disagree in pattern and magnitude of projected changes in atmospheric circulation and climate variability, particularly for precipitation (e.g., with respect to the Indian and West African monsoons).

Not exact matches

«Our new data however, contrasts with sub-Saharan Africa and demonstrates that the South African climate responded in the opposite direction, with increasing rainfall, that can be associated with a globally occurring southward shift of the tropical monsoon belt.»

This «bipolar seesaw behavior of the Atlantic Ocean,» as the paper calls it, led to a southward shift in the Intertropical Convergence Zone, which carried the monsoon rains away from sub-Saharan Africa and into the South African region.

He has created computer simulations indicating that sulfate clouds could potentially weaken the Asian and African summer monsoons, reducing rain that irrigates the food crops of billions of people.

Their mother stands alone by the deep end, sari - clad under the red monsoon umbrella she carries as portable shade from the West African sun.

Suddenly, a drought - stricken African region could benefit from a Sahel monsoon, with climate change storm clouds breaking over Chad and Mali.

Impact of greenhouse warming on the West African summer monsoon.

i.e. Atlantic Panel, Pacific Panel, Indian Panel, Southern Panel, American Monsoon, African Panel etc..

F. Kucharski, F., A. Bracco, J. H. Yoo, A. M. Tompkins, L. Feudale, P. Rutic and A. Dell» Aquilac, 2009: A Gill — Matsuno - type mechanism explains the tropical Atlantic influence on African and Indian monsoon rainfall, Quarterly Journal of Meteorology, DOI: 10.1002 / qj.406

7 July, 2017 — Suddenly, a drought - stricken African region could benefit from a Sahel monsoon, with climate change storm clouds breaking over Chad and Mali.