Sentences with phrase «past precipitation changes»

It is possible to reconstruct past precipitation changes by measuring the stable hydrogen isotopic composition in terrestrial plant waxes because rainfall is the primary source of hydrogen stored in plant material.

Not exact matches

«This record shows that there have been quite large changes in El Niño precipitation in this area in the past, and that we might expect large changes in the future,» Nelson said.

«Some fungal outbreaks over the past couple of decades, such as Dothistroma needle blight, could likely have been anticipated by tracking how temperature and precipitation were changing together,» said Mahony, who has worked as a forester in British Columbia for 10 years and has witnessed the impacts of climate change on the ground.

«Now we can compare precipitation changes in various parts of Europe, Asia, and North America for the past twelve centuries.

When nitrogen isotopes change in response to variation in winter precipitation over the past 2,000 years, this signature is transferred from the soil to plant leaves to insect to bat and ultimately guano.

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.

Understanding past changes in the characteristics of such events, including recent increases in the intensity of heavy precipitation events over a large part of the Northern Hemisphere land area (3 — 5), is critical for reliable projections of future changes.

On average in the United States, the amount of rain falling during the heaviest 1 percent of rainstorms has increased nearly 20 percent during the past 50 years — almost three times the rate of increase in total precipitation.4, 5 The Midwest saw an even larger average increase of 31 percent, surpassed only by the Northeast (at 67 percent).4 Scientists attribute the rise in heavy precipitation to climate change that has already occurred over the past half - century.6

The observed global greening has occurred in spite of all the many real and imagined assaults on Earth's vegetation that have occurred over the past several decades, including wildfires, disease, pest outbreaks, deforestation, and climatic changes in temperature and precipitation, more than compensating for any of the negative effects these phenomena may have had on the global biosphere.

Risks of waterborne illness and beach closures resulting from changes in the magnitude of recent precipitation (within the past 24 hours) and in lake temperature are expected to increase in the Great Lakes region due to projected climate change.97, 98,99,100

While there was no apparent change in drought duration in the Midwest region as a whole over the past century, 90 the average number of days without precipitation is projected to increase in the future.

The shift can be explained by changing precipitation patterns and higher average temperatures that make moisture evaporate from the soil more rapidly than in the past, the study said.

The report, written by 220 experts from 62 countries, finds that climate change has already contributed to changes in extreme events — such as heat waves, high temperatures, and heavy precipitation — in many regions over the past 50 years.

Since the start of the 21st century, there are many places in the western United States where long - term patterns in precipitation have changed from past conditions (Allen et al. [2010]-RRB-.

To identify major drivers of southwestern climate change we perform a multiple - linear regression of the past 100 years of the southwestern US temperature and precipitation.

This section documents regional changes and slow fluctuations in atmospheric circulation over past decades, and demonstrates that these are consistent with large - scale changes in other variables, especially temperature and precipitation.

Singh and her Lamont colleagues research climate change impacts on weather patterns by analyzing weather trends in daily temperatures, precipitation, and atmospheric patterns that have occurred during the past 40 years, in the post-satellite era.

The team used changes in dust levels and stable water isotopes in the annual ice layers of the two - mile - long Greenland ice core, which was hauled from the massive ice sheet between 1998 to 2004, to chart past temperature and precipitation swings.

This Section places particular emphasis on current knowledge of past changes in key climate variables: temperature, precipitation and atmospheric moisture, snow cover, extent of land and sea ice, sea level, patterns in atmospheric and oceanic circulation, extreme weather and climate events, and overall features of the climate variability.

Abrupt changes in precipitation and temperature resolved in a record spanning the past 60,000 years from Lake Tanganyika, East Africa, are coeval with Northern Hemisphere climate events.

In recent years, many have expressed concerns that global terrestrial NPP should be falling due to the many real (and imagined) assaults on Earth's vegetation that have occurred over the past several decades — including wildfires, disease, pest outbreaks, and deforestation, as well as overly - hyped changes in temperature and precipitation.

Over the past few decades, warming temperatures have been linked to changes in the percentage of precipitation falling as rain or snow, and snow melt anomalies showing a trend towards earlier and faster stream flow.

This isn't just an educated guess — past societies have collapsed because of changes in temperature and precipitation... Brian Fagan documents the demise of the Pueblo Indian civilization at Chaco Canyon (in what's now New Mexico) during the Medieval Warm Period (roughly between 800 and 1300 A.D.).

Considering both, precipitation proxies should give a fair indication of past climate change.

We find that although there has not been a substantial change in the probability of either negative or moderately negative precipitation anomalies in recent decades, the occurrence of drought years has been greater in the past two decades than in the preceding century.

It seems clear to me that the sentence is about responses to a shift from one climate regime, the recent past and present day, to another, with less precipitation, in the future (it is the IPCC climate change impacts report after all, and they do say `... not necessarily producing gradual changes between the current and the future situation»).