Sentences with phrase «of tropical cyclone activity»

Graphic showing that we've been in an active period of tropical cyclone activity since 1995, where the average number of named tropical storms has jumped significantly to 15.2 per year.

Unfortunately, despite this clear empirical evidence, the climate change and global warming doomsday alarmists attempt to portray the 2017 season as a sign of CO2 - induced climate catastrophe - and that is not being well accepted by the actual hurricane experts (here, here, here) who have been on the front lines of tropical cyclone activity and impact research.

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.

Now a team from Australia and the Netherlands has analysed stalagmites to create an index of tropical cyclone activity that stretches back 1500 years.

«Accurate seasonal and decadal predictions of tropical cyclone activity are essential for the development of mitigation strategies for the 2.7 billion residents living within cyclone prone regions.

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.

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

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 Sahara.

That signal is translating into all sorts of events — droughts, intense rainfall, more intense tropical cyclone activity, crop stress, heat waves, and so on.

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.

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.

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.

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.

The lesson has a range of learning activities suitable to different types of learners; there are video clips to make real the effects of tropical cyclones, a picture study task, an interactive task to allow students to move around the room and share their learning and there is a numeracy task for those logical mathematical earners.

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).

«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.

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

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).

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.

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.

It adds this substantial cautionary note, however: that «multi-decadal variability and the quality of the tropical cyclone records prior to routine satellite observations in about 1970 complicate the detection of long - term trends in tropical cyclone activity.»

Accumulated cyclone energy (ACE) is a measure used by the National Oceanic and Atmospheric Administration (NOAA) to express the activity of individual tropical cyclones and entire tropical cyclone seasons, * particularly the North Atlantic hurricane season.

On the other hand, I don't know if there are correlation studies of the cyclone activity with the surface insolation trends in past decades and for each tropical bassin.

Multi-decadal variability and the quality of the tropical cyclone records prior to routine satellite observations in about 1970 complicate the detection of long - term trends in tropical cyclone activity.

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.

• What are some other impacts of climatic variability during the MCA / MWP regarding such topics as changes in ocean basin tropical cyclone activity?

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.

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 development of a new tropical cyclone activity index spanning the last 1500 years has enabled the examination of tropical cyclone climatology at higher temporal resolution than was previously possible.

«The IPCC hierarchy had its mind made up years ago to make every attempt possible to link rising levels of CO2 with increases in global hurricane intensity and frequency... Input from skeptics or any hypothesis or data that did not link rises in CO2 to increases in tropical cyclone activity was to be avoided, suppressed, or rejected.»

an improved understanding of interannual variability and trends in the tropical cyclone activity from the beginning of the 20th century to the present

His research activities revolve around tropical cyclone simulations and prediction models, 3D and 4D variational analysis schemes, ensemble forecasting techniques and coupling of mesoscale Numerical Weather Prediction (NWP) models to Atmospheric Transport and Dispersion (ADT) models.

I note that the recent paper shows a dramatic uptick in storm activity that has been convincingly refuted by «strong evidence that there has been no systematic change in the number of north Atlantic tropical cyclones during the 20th century.»

Global tropical cyclone activity is near historic lows, the frequency of major U.S. hurricanes has declined, and big tornados have dramatically declined since the 1970s.

Tropical cyclone activity and intensity increasing Record droughts, floods, heat waves, cold spells, high tides occurring Unequivocal warming of the climate system observed with very high confidence that human activities are to blame Temperature rising even more dramatically in Arctic, threatening ice loss and extinction of species Halving human CO2 emissions immediately might save the planet from catastrophe.

WWLLN - TC users can access four categories of images to follow the lightning activity and satellite observations of tropical cyclones:

This means that the potential devastation and destruction that could be caused by tropical cyclones will get worse and worse in the future, regardless of any change in cyclone activity.

[8] In the north Atlantic and the northeastern Pacific oceans, tropical waves move along the axis of the ITCZ causing an increase in thunderstorm activity, and under weak vertical wind shear, these clusters of thunderstorms can become tropical cyclones.

The effects of tropical cyclones early in the year were followed by regular northwest cloud - band activity between May and mid-July, when waters northwest of the continent were unusually warm as part of a negative phase of the Indian Ocean Dipole.

The Australian monsoon exhibits large interannual and intra-seasonal variability, largely associated with the effects of ENSO, the Madden - Julian Oscillation (MJO) and tropical cyclone activity (McBride, 1998; Webster et al., 1998; Wheeler and McBride, 2005).