Sentences with phrase «recent warming patterns»

Not exact matches

Given the shared urban and historical pattern, the researchers also predicted that scale insects would be more abundant in rural forests today than in the past, as a result of recent climate warming.

While natural patterns of certain atmospheric and ocean conditions are already known to influence Greenland melt, the study highlights the importance of a long - term warming trend to account for the unprecedented west Greenland melt rates in recent years.

Since levels of greenhouse gases have continued to rise throughout the period, some skeptics have argued that the recent pattern undercuts the theory that global warming in the industrial era has been caused largely by human - made emissions from the burning of fossil fuels.

Nonetheless, even if the substantial recent trend in the AO pattern is simply a product of natural multidecadal variability in North Atlantic climate, it underscores the fact that western and southern Greenland is an extremely poor place to look, from a signal vs. noise point of view, for the large - scale polar amplification signature of anthropogenic surface warming.

Thompson and Solomon (2002) showed that the Southern Annular Mode (a pattern of variability that affects the westerly winds around Antarctica) had been in a more positive phase (stronger winds) in recent years, and that this acts as a barrier, preventing warmer air from reaching the continent.

The new study, detailed in the March 13 issue of the journal Science, suggests that the persistent patterns that drove this and other prolonged heat waves in recent years may have their roots in the the rapid warming of the Arctic.

Statistically, the pattern is too extreme to be considered a result of chance, found a new study, which pointed a finger directly at global warming as the underlying cause of the recent spike in extra-hot summers.

Many pragmatists and scientists see attempts to link warming to temporal weather patterns (e.g. Sen. Feinstein's recent remarks on Capitol Hill) as a mistake, one that undermines the real debate.

The pattern of recent climate warming is also reinforced by the information coming out of permafrost monitoring (eg the PACE project.

Global Warming, Ozone Holes, and Magnetic Poles «An Investigation Reexamining Brewer - Dobson Ozone Theory to Uncover the Atmospheric Role of Paramagnetic Oxygen in Recent Extreme Weather Patterns and Global Climate Change» by Harry Todd

In contrast, the warming during the most recent period, often used as evidence of human induced climate change, is characterized by temperature moderation — the pattern of temperature rise exhibits a strong, preferential warming of the coldest days of the year.

Nonetheless, even if the substantial recent trend in the AO pattern is simply a product of natural multidecadal variability in North Atlantic climate, it underscores the fact that western and southern Greenland is an extremely poor place to look, from a signal vs. noise point of view, for the large - scale polar amplification signature of anthropogenic surface warming.

From the beginning, many of the complaints about Mann's work were more about how it was appropriated by others than the research itself; the first paper of his identifying a «hockey stick» pattern to temperatures over the last millennium, in 1999, was laced with caveats in describing the distinct sharp recent warming trend.

I think the latter is likely — these recent cold winters are part of the much - discussed «warm Arctic — cold continents» pattern (see, eg, Overland et al 2011) and could be related to the dwindling ice cover on the Arctic Ocean, as we explained here.

Updated, 3:10 p.m. Using climate models and observations, a fascinating study in this week's issue of Nature Climate Change points to a marked recent warming of the Atlantic Ocean as a powerful shaper of a host of notable changes in climate and ocean patterns in the last couple of decades — including Pacific wind, sea level and ocean patterns, the decade - plus hiatus in global warming and even California's deepening drought.

The Wilkins Ice Shelf appears to be following a pattern seen in other parts of the peninsula, which has warmed markedly in recent decades and shed other fringing ice shelves.

In fact, based on the pattern of recent warming periods the temps should either be stable or starting downward.

At the time, my focus was Muller's overarching point about recent overstatements of a link between global warming and tornado patterns, not his claim of a decline.

There was an interesting study in Nature Geoscience last Sunday showing pretty clearly that the accelerating flow of the Jacobshavn glacier in recent years was most likely driven by an influx of warm deep seawater, and that shift was likely due to changes in pressure and wind patterns over the North Atlantic Ocean.

The deep, northward - driving synoptic pattern associated with both powerful high Latitude storms and warm winds is only something we've begun to see during recent years.

«What Caused the Recent «Warm Arctic, Cold Continents» Trend Pattern in Winter Temperatures?»

This climate change induced blocking pattern has also been associated with numerous warm air invasions of the Northern Hemisphere polar region, the most recent of which occurred yesterday.

Current work1 has provided evidence of the increase in frequency and intensity of winter storms, with the storm tracks shifting poleward, 2,3 but some areas have experienced a decrease in winter storm frequency.4 Although there are some indications of increased blocking (a large - scale pressure pattern with little or no movement) of the wintertime circulation of the Northern Hemisphere, 5 the assessment and attribution of trends in blocking remain an active research area.6 Some recent research has provided insight into the connection of global warming to tornadoes and severe thunderstorms.7, 8

Nares Strait Recent ice advection patterns; warm water advances into the Arctic from the Atlantic; ice distribution patterns: all of these things show that conditions continue to be advantageous for export of ice through Fram Strait.

A warm, dry western North America occurring in combination with a cold, snowy east is not unusual, but the prevalence and persistence of this pattern in recent years have piqued the interests of climate researchers.

The best information we have now from our most recent research is that the chances of getting a fingerprint match between that human fingerprint pattern of warming low down and cooling up high and purely natural causes is infinitesimally small.

Indeed that most recent warming occurred as ENSO dragon kings in 1976/77 and 1998/2001 and that the satellite evidence suggests that cloud radiative forcing dominated in the interim in a secular pattern negatively correlated with sea surface temperature.

But observations from recent years support the idea that the melting ice is a key factor in shaping the persistent pattern of warm temperatures over the Arctic that displaces bitter cold air toward North America and especially Eurasia, says conference co-chair Judah Cohen, a climate scientist at the Massachusetts Institute of Technology.

Studies have found that warmer temperatures in recent decades help explain a downward trend in snowpack in the western United States, even after patterns of natural climate variability have been considered [9], [56].

One recent study that examined the patterns in warming and coral bleaching between 1985 and 2012 found that 97 percent of the sites it studied had warming trends with 60 percent showing severe conditions.

Recent work (e.g., Hurrell 1995, 1996; Thompson and Wallace 1998; Corti et al., 1999) has suggested that the observed warming over the last few decades may be manifest as a change in frequency of these naturally preferred patterns (Chapters 2 and 7) and there is now considerable interest in testing the ability of climate models to simulate such weather regimes (Chapter 8) and to see whether the greenhouse gas forced runs suggest shifts in the residence time or transitions between such regimes on long time - scales.

The distribution, cyclical pattern, rate, and extent of recent global warming are [fully / mostly / partially / not] consistent with natural variability in Earth's climate.

As I have also noted in recent public comments, additional mechanisms have been identified by which changes in atmospheric circulation patterns that may be a result of global warming could be affecting droughts in the American West.

Spatial trend patterns differ for the warm and cold extremes, with the warm extremes showing continuous positive trends across the globe and the cold extremes exhibiting a coherent cooling pattern across the Northern Hemisphere mid-latitudes that has emerged in the recent 15 years and is not reproduced by the models.

Furthermore, the missing hotspot in the atmospheric warming pattern observed during the last warming period proves that (1) the IPCC climate theory is fundamentally broken, and (2) to the extent that their theory correctly predicts the warming signature of increased carbon dioxide, we know that carbon dioxide definitely did not cause the recent warming (see here for my full explanation of the missing hotspot).

1) Latitudinal temperature anomaly paradox (Strike 1) The latitudinal temperature anomaly paradox is the fact that the latitudinal pattern of warming in the last 50 years does match the pattern of warming that would occur if the recent increase in planetary temperature was caused by the CO2 mechanism.

This work looked at climate model data to confirm that sea - surface temperature patterns can be used as an indicator of Amoc's strength and revealing that it has been weakening even more rapidly since 1950 in response to recent global warming.

Regional circulation patterns have significantly changed in recent years.2 For example, changes in the Arctic Oscillation can not be explained by natural variation and it has been suggested that they are broadly consistent with the expected influence of human - induced climate change.3 The signature of global warming has also been identified in recent changes in the Pacific Decadal Oscillation, a pattern of variability in sea surface temperatures in the northern Pacific Ocean.4

They've looked at the Holocene, and showed a pattern of variation, warmer originally, then declining to recent.

@Mikel: The recent cooling (last 5 years or so) in Asia is most likely due to the frequent «Warm Arctic Cold Continent» (WACC) weather pattern in winter.

Jennifer Francis, a researcher at Rutgers University and the most prominent proponent of the hypothesis that Arctic warming is altering the jet stream around the Northern Hemisphere, told Climate Central that while the cold snap is brief in duration, it fits with patterns observed this year and in other recent years.

While natural patterns of certain atmospheric and ocean conditions are already known to influence Greenland melt, the study highlights the importance of a long - term warming trend to account for the unprecedented west Greenland melt rates in recent years.

And if you look at the paleo data, you find that not only to the poles warm in excess of what the models predict, in recent geologic ages you can see a North - then - South pattern, presumably due to 1.

The studies indicate that the observed pattern of mid-tropospheric warming in recent decades over west central Asia led to an increase in instability of the western winds thereby increasing WDs leading to a higher propensity for heavy precipitation over the western Himalayas.

The explanation of them (warm oceans cold continents weather patterns) is just somewhat more recent.

We are particularly interested in abrupt climate change and patterns of droughts and floods as well as warm intervals and recent coolings such as the Little Ice Age.

On a related note, there has been a considerable amount of recent interest focused upon a possible increase in the frequency and / or intensity of high - amplitude atmospheric wave patterns (and associated extreme weather events) due to enhanced warming of the Arctic over the past 2 - 3 decades.

Instead of the proposed positive feedback producing ever faster atmospheric temperature increases, the plot reveals a very strong warming trend that accelerated during the 2015/16 El Nino phenomenon, which then quickly decelerated to a per century trend of 4.3 degrees Celsius - and, in the recent past, similar deceleration patterns have lead to outright negative per century cooling trends.

But figure 2 shows the 1920 - 1939 anomoly as localized in the arctic, as if the energy was transferred there from further south, while in recent decades it is only a small part of a global warming pattern.

This could perhaps be the identification of cyclical patterns in the temperature records that explain recent warming, the GCR experiments, an unkown feedback (or the full understanding of clouds, removing their possibility as a positive feedback as described by thr IPCC) or something else.