Sentences with phrase «cyclone activity»
"Cyclone activity" refers to the occurrence and movement of cyclones, which are powerful rotating storm systems characterized by strong winds and intense weather conditions. Full definition
These include droughts in Africa and North America, decline in Arctic sea - ice, changes in tropical cyclone activity in the Atlantic, and changes in the Northern Hemisphere atmospheric large - scale circulation.
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Camargo, S., A.G. Barnston, and S.E. Zebiak, 2005: A statistical assessment of tropical cyclone activity in atmospheric general circulation models.
Projected changes in the Arctic frontal zone and summer Arctic cyclone activity in the CESM Large Ensemble.
Geng, Q., and M. Sugi, 2003: Possible change of extratropical cyclone activity due to enhanced greenhouse gases and sulfate aerosols — Study with a high - resolution AGCM.
The US CLIVAR Hurricane Working Group was formed to improve understanding of interannual variability and trends in the tropical cyclone activity from the beginning of the 20th century to the present and quantify changes in the characteristics of tropical cyclones under a warming climate.
The IPCC states that humans have, «more likely than not», contributed to the trend towards intense tropical cyclone activity since the 1970s.
Basins that warm more than the tropical average tend to show larger increases in tropical cyclone activity for a number of metrics.
«Small thunderstorms may add up to massive cyclones on Saturn: New model may predict cyclone activity on other planets.»
When El Niño conditions are present in the equatorial Pacific like in 2015, tropical cyclone activity across the North Atlantic basin tends to be suppressed due to increased wind shear, an unfavorable condition for tropical cyclone development.
Certainly on a global scale, there is no evidence of an increase in tropical cyclone activity over the last 50 years.
The North Atlantic, western North Pacific and northern Indian Ocean were among regions seeing slightly below - average cyclone activity.
This summer cyclone activity has been low and the season has been late.
This is why the recent IPCC report has «low confidence» that global warming contributes significantly to current cyclone activity *.
Long - term trends: tropical cyclone activity low in recent years, perhaps edging upwards again.
«Sahara greening may intensify tropical cyclone activity worldwide.»
In the Department of Meteorology at Stockholm University (MISU), researchers have done a series of model simulations investigating tropical cyclone activity during an earlier warm climate, the mid-Holocene, 6,000 years ago.
«Hurricanes key to carbon uptake by forests: Increases in carbon uptake by southeast US forests in response to tropical cyclone activity alone exceed carbon emissions by American vehicles each year.»
Tracking changes in Arctic cyclone activity through time, Vavrus calculated a statistically significant, though minor, increase in extreme Arctic cyclone frequency over the study period, with increases strongest near the Aleutian Islands and Iceland.
Over the next few months, the globe might see an uptick in tropical cyclone activity thanks to an El Niño that is showing signs of asserting itself more forcefully.
The Accumulated Cyclone Energy (ACE) index of tropical cyclone activity also indicated a below - average season in the North Atlantic.
Methods: While a few studies in the past investigated the influence of climate phenomena such as the El Niño Southern Oscillation and the Madden - Julian Oscillation on the inter-annual variability of tropical cyclones in the post-monsoon Bay of Bengal, changes in long - term cyclone activity are less well understood.
Carrasco, J.F., D.H. Bromwich, and Z. Liu, 1997: Mesoscale cyclone activity over Antarctica during 1991, Part 1: Marie Byrd Land.
Part of the difficulty in identifying the human component, if any is, as the IPCC Summary itself notes, that tropical cyclone activity varies naturally over the decades.
«This variability makes detecting any long - term trends in tropical cyclone activity difficult,» according to the WMO statement.
These are among the latest efforts at trying to build a record of Atlantic tropical - cyclone activity reaching as far into the past as these «proxies» for written records will take them.
But that doesn't mean there aren't records of greater cyclone activity in some parts of the world.
«We can not be sure that the decrease in tropical cyclone activity highlighted in our study is due to climate change, but nonetheless our results are mirroring these model forecasts,» said Haig.
Two camps formed, with one arguing that the 1995 - 2005 period of high cyclone activity was just part of natural variability, and the other arguing that it was due to man - made global warming.
In their words: «Our record of tropical cyclone activity reveals no trends in LACE in the best - sampled regions for the past 320 years.
Drought, loss of coral biodiversity, loss of 30 % of all species on earth and increased cyclone activity combined with rapidly increasing sea level all contribute to the most likely results of even a 3 °C rise.
Characteristics of winter cyclone activity in the northern North Atlantic: Insights from observations and regional modeling.Journal of Geophysical Research 112 (D3).
Despite previous studies indicating that intraseasonal oscillations in the northeastern Pacific Ocean can significantly influence cyclone activity in the western Caribbean Sea and the Gulf of Mexico, dynamic models have so far been unable to accurately reproduce this relationship.
Apart from wreaking havoc and killing a lot of people, Bopha's main effect was to nudge annual cyclone activity back up towards something approaching the long - term norms.
In the bottom table, Klotzbach depicts the entire Northern Hemisphere's 2017 tropical cyclone activity versus the activity for the 1981 - 2010 period.
In contrast to strong sea surface temperature control on basin counts, unpredictable internal variability in track density is strong over the Gulf Coast and US East Coast - indicating that prediction of regional cyclone activity, especially landfall hurricanes, is challenging.
Response of Northern Hemisphere extratropical cyclone activity and associated precipitation to climate change, as represented by the Community Climate System Model.
IPCC AR5 concluded that there is medium confidence that reduced aerosol forcing contributed to the observed increase in Atlantic tropical cyclone activity since the 1970s, but does not state any estimate of the magnitude of contribution.
Tied for fourth lowest sea ice extent, in a three - way tie for lowest sea ice volume, the fastest one month sea ice loss for the date, and unusual Arctic cyclone activity affecting the decayed ice of the polar regions, focus just on the lake too trivializes what's happening in a region the size of the Arctic Ocean.
He cites observations made in Dr. Bill Gray's SUMMARY OF 2005 ATLANTIC TROPICAL CYCLONE ACTIVITY for this connection.
«Consequently, tropical cyclone activity across the western Caribbean may remain essentially stable over the current century, which has important implications for water availability in this region.
In the Southern Hemisphere, fewer analyses have been completed, but they suggest a decrease in extra-tropical cyclone activity since the 1970s.»