Sentences with phrase «cyclone activity in»

However, an important question concerns whether global warming has or will substantially affect tropical cyclone activity in other basins.

There is observational evidence for an increase of intense tropical cyclone activity in the North Atlantic since about 1970, correlated with increases of tropical sea surface temperatures.

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.

• About the past: «There is observational evidence for an increase of intense tropical cyclone activity in the North Atlantic since about 1970, correlated with increases of tropical sea surface temperatures.

Projected changes in the Arctic frontal zone and summer Arctic cyclone activity in the CESM Large Ensemble.

In a study published in the journal Climatic Change, scientists Michael Chenoweth and Dmitry Divine analyze the history of tropical cyclone activity in the Lesser Antilles from 1638 to 2009.

The main modulating influence on tropical cyclone activity in the western North Pacific appears to be the changes in atmospheric circulation associated with ENSO, rather than local SSTs (Liu and Chan, 2003; Chan and Liu, 2004).

But that doesn't mean there aren't records of greater cyclone activity in some parts of the world.

Wang, X. L., Y. Feng, G. P. Compo, V. R. Swail, F. W. Zwiers, R. J. Allan, and P. D. Sardeshmukh, 2012: Trends and low frequency variability of extra-tropical cyclone activity in the ensemble of twentieth century reanalysis.

Influence of Pacific Decadal Oscillation on the relationship between ENSO and tropical cyclone activity in the Bay of Bengal during October — December The relationship between ENSO and tropical cyclones (TCs) activity in the Bay of Bengal (BoB) during October — December under cold (1950 — 1974) and warm (1975 — 2006) phase of Pacific Decadal Oscillation (PDO) is investigated.

There is observational evidence for an increase of intense tropical cyclone activity in the North Atlantic since about 1970, correlated with increases in tropical SSTs.

While this study is undoubtedly an important contribution to the literature, introducing a potentially useful methodology for refining estimates of past tropical cyclone activity in all the major basins, it is hardly the last word (see e.g. the discussion thread in our previous article on the paper).

Those conditions just tend to be more favorable during the officially recognized six - month season, which encompasses about 97 percent of tropical cyclone activity in the Atlantic.

The environmental and societal toll makes it important to understand the future of tropical cyclone activity in this region.

Not exact matches

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.

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.

In a recent study, researchers at the Department of Meteorology at Stockholm University have found that tropical cyclone activity may have increased during past warm climates in connection with a greening of the SaharIn a recent study, researchers at the Department of Meteorology at Stockholm University have found that tropical cyclone activity may have increased during past warm climates in connection with a greening of the Saharin connection with a greening of the Sahara.

«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.»

Dr. Vavrus suggests that, as of yet, the effect of climate change on Arctic cyclone activity has been minimal, but that future changes in polar climate will drive stronger shifts.

These cyclones are characterized by strong localized drops in sea level pressure, and as Arctic - wide decreases in sea level pressure are one of the expected results of climate change, this could increase extreme Arctic cyclone activity, including powerful storms in the spring and fall.

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.

In the case of Saturn, the planet's atmospheric conditions and storm activity are within the range that would generate a large polar cyclone.

The article, «Extreme rainfall activity in the Australian tropics reflects changes in the El Niño / Southern Oscillation over the last two millennia,» presents a precisely dated stalagmite record of cave flooding events that are tied to tropical cyclones, which include storms such as hurricanes and typhoons.

Thus, the researchers interpreted the flood layers in their stalagmites largely as recording tropical cyclone activity.

The next meeting will be at the end of this year and a statement of the potential changes in tropical cyclone activity, together with the degree of uncertainty, will be issued following that meeting.

And the researchers suggest the cyclone shift may be linked to that growth, which is connected to more heat - trapping greenhouse gases in the atmosphere as a result of human activity.

«We've shown that there are strong links between damage and disease in this study, now we're interested in understanding and managing other potential drivers of diseases that involve injury - such as outbreaks of crown - of - thorns starfish, cyclones, and recreational activities like anchoring.»

The Accumulated Cyclone Energy (ACE) index of tropical cyclone activity also indicated a below - average season in the North Atlantic.

While the new formula, which accounts for both temperature and salinity, can be used to forecast tropical cyclone intensity in real time, it can also be applied to the results of climate modeling to provide scientists with a framework to evaluate changes in future tropical cyclone activity.

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.

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.

NOAA has issued its annual forecast for the hurricane season, along with its now - standard explanation that there is a natural cycle of multidecadal (40 - 60 year) length in the North Atlantic circulation (often referred to as the «Atlantic Multidecadal Oscillation» — see Figure), that is varying the frequency of Atlantic tropical cyclones, and that the present high level of activity is due to a concurrent positive peak in this oscillation.

Use these activities and Internet connections to engage students of all ages in a study of these powerful and frightening storms, which are called hurricanes, typhoons or cyclones depending on where they happen in the world.

Also available in our Natural Disaster Activity Pack This activity pack contains 14 activities to explore the topic of Tropical Cyclones (which are also called cyclones, hurricanes and typhoons depending upon where you live in theActivity Pack This activity pack contains 14 activities to explore the topic of Tropical Cyclones (which are also called cyclones, hurricanes and typhoons depending upon where you live in theactivity pack contains 14 activities to explore the topic of Tropical Cyclones (which are also called cyclones, hurricanes and typhoons depending upon where you live in theCyclones (which are also called cyclones, hurricanes and typhoons depending upon where you live in thecyclones, hurricanes and typhoons depending upon where you live in the world).

(worksheet for web activity on preparing for tropical cyclone)- $ 2 Summary (summarising worksheet article about tropical cyclones)- Cyclone in a bottle (instructions and worksheet for bottle experiment)- Tropical Cyclone Vocabulary Foldable (foldable with vocabulary words and definitions)

«Multidecadal variability of Atlantic tropical cyclone activity is observed to relate to the Atlantic Multidecadal Oscillation (AMO)-- a mode manifesting primarily in sea surface temperature (SST) in the high latitudes of the North Atlantic.

Since the climate response to the North Atlantic SST anomalies is primarily forced at the low latitudes and the AWP is in the path of or a birthplace for Atlantic tropical cyclones, the influence of the AMO on Atlantic tropical cyclone activity may operate through the mechanism of the AWP - induced atmospheric changes.

By Rasmus Benestad & Michael Mann Just as Typhoon Nargis has reminded us of the destructive power of tropical cyclones (with its horrible death toll in Burma — around 100,000 according to the UN), a new paper by Knutson et al in the latest issue of the journal Nature Geosciences purports to project a reduction in Atlantic hurricane activity (principally the «frequency» but also integrated measures of powerfulness).

More specifically, an anomalously large (small) AWP reduces (enhances) the vertical wind shear in the hurricane main development region and increases (decreases) the moist static instability of the troposphere, both of which favor (disfavor) Atlantic tropical cyclone activity.

The extra runoff in the MPI cases is related to a northward shift of cyclone activity.

He cites observations made in Dr. Bill Gray's SUMMARY OF 2005 ATLANTIC TROPICAL CYCLONE ACTIVITY for this connection.

In fact, similar press conferences were held for two other papers (both also questioning the premise that climate change is likely to lead to an increase in tropical cyclone activity) by Wang and by Vecchi and SodIn fact, similar press conferences were held for two other papers (both also questioning the premise that climate change is likely to lead to an increase in tropical cyclone activity) by Wang and by Vecchi and Sodin tropical cyclone activity) by Wang and by Vecchi and Soden

While it is «likely» that anthropogenic influences are behind the changes in cold days and warm days, there is only «medium confidence» that they are behind changes in extreme rainfall events, and «low confidence» in attributing any changes in tropical cyclone activity to greenhouse gas emissions or anything else humanity has done.

They add that this slow pace currently makes the trend undetectable due to inadequate long - term records and the considerable variance in cyclone activity from season to season.

The clear seasonality in TCs («hurricane season») with highest activities during the summer is one of the strongest pieces of empirical evidence that higher temperatures give more favourable conditions for tropical cyclones (After all, TCs only form in the warm tropics...).

NOAA also forecasts a high hurricane activity for the remainder of the season, and time will show if this season will match the 2004 in terms of number of tropical cyclones.

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.

The uncertainties in the historical tropical cyclone records, the incomplete understanding of the physical mechanisms linking tropical cyclone metrics to climate change, and the degree of tropical cyclone variability provide only low confidence for the attribution of any detectable changes in tropical cyclone activity to anthropogenic influences.

Adam G: You can not conclude that just from looking at a basin which has less than 15 % of the total global tropical cyclone activity, and also selecting groups of years that coincide exactly with the positive and negative Atlantic Multi-decadal Oscillation phases, which would dominate over any AGW trend in this basin if it exists.