In addition to causing more downpours, these enhanced evaporation rates are also leading to an increase
in drought severity in places that are already dry, like California.
No formal attribution studies for changes
in drought severity in North America have been attempted.
A vicious trend that worsened again in recent days with yet another jump
in drought severity as exceptional drought conditions surged to cover a majority of the state.
The study found a similar response in trees across the world, where death increases consistently with increases
in drought severity.
These results illustrate how changes
in drought severity can alter the transmission dynamics of vector - borne diseases
The researchers found that most areas that saw increases in fire activity also experienced increases
in drought severity during the same time period.
The study found a similar response in trees across the world, where death increases consistently with increases
in drought severity.
Not exact matches
The after effects of climate change will worsen the
severity and duration of
droughts in years to come, the EEA says.
The impact of global warming has been linked to the
severity of
droughts, water scarcity, and food shortages
in war - torn Syria.
For example, extreme
droughts may reduce productivity due to water stress and increases
in the frequency and
severity of forest fires.
To study changes
in soil moisture, the researchers used the Palmer
drought severity index to examine average water availability and loss over the study period.
The impact of global warming has been linked to the
severity of
droughts, water scarcity, and food shortages
in war - torn Syria, but now an internationally recognized expert on water resources has identified climate change as a factor contributing to political turmoil
in the region.
They compared fluctuations
in reservoir water levels between 2003 and 2016 to a variety of factors, such as precipitation, the
severity of the
drought, the snowpack levels
in the Sierras, and levels of other California reservoirs.
Adding to the
severity of the groundwater depletion, the 2012 - 2016
drought coincided with Central Valley farmers transitioning from row crops to more high - value, thirsty crops like almonds, pistachios and walnuts, which are grown
in groves.
«We haven't seen much change
in the
severity of these fires, but they are getting bigger on average, which may be due to
drought - driven shrub mortality.»
An analysis, published
in the journal Ecology Letters, suggests that forests are at risk globally from the increased frequency and
severity of
droughts.
And fire
severity is already increasing
in many forests due to climate change — what is now thought of as a
drought in some locations may be considered average by the end of the next century.
Several studies, including one published
in 2015
in the journal Science Advances, estimate that the
severity and frequency of
droughts could increase.
Although
droughts have been a natural part of the year - to - year variations
in the Amazon's climate, both the frequency and
severity of
droughts in the rainforest have been increasing over the last decade because of climate change, Aragão says:
Many people are very worried, even scared, about abrupt climate change causing extreme weather events like torrential rains with floods,
droughts, high winds, etc. increasing
in severity, duration, frequency and impact.
They also observed a 1.55 percent increase
in mortality rate when
drought escalated to «high
severity worsening» conditions.
Finally, the
severity and length of the recent
drought [e.g. Nicholls 2006] and the associated fire danger has not been seen
in the available records.»
«The
severity and frequency of
droughts appear to have increased
in parts of Europe,
in particular
in southern Europe and south ‐ eastern Europe.»
However, I am curious whether you will do the same with respect to the diminished nutritional value of these crops, the increased global prevailence and
severity of
droughts, diminished agricultural output
in Indonesia, etc, or, as is suggested by your response, do you intend to «accentuate the positive» with regard to climate change by omitting the costs?
The increase
in drought frequency, duration, and
severity is found to be significant
in Africa, Eastern Asia, Mediterranean region, and Southern Australia, while the Americas and Russia show a decrease
in each
drought component.
The connection between elevated greenhouse gases and
drought in the American West is that greenhouse - induced warming is very likely to increase the frequency and
severity of
drought conditions
in the region.
As far as we know, there is no reason why
droughts of the duration,
severity, and spatial extent experienced
in the medieval period could not occur
in the future.
And the Palmer
Drought Severity Index, a standard measure for
drought, does show a significant trend towards more serious
drought conditions
in California.
Some large high
severity fires occurred
in these areas during the 1950s
drought, and subsequent
droughts, but the largest total areas burned
in forests were an order of magnitude smaller than the largest fires today.
BTW, as noted above, I should have paid more attention to the role of increased evaporation
in increasing the
severity of
drought, and reducing streamflow, the relevant variable for my analysis.
Shows that over the next 30 years, increased
drought severity from climate change could triple West Nile virus cases, but only
in regions with low human immunity
During times of
drought, the feedbacks of higher temperature extremes and dry conditions are likely to amplify both temperature extremes and
drought severity in the United States.
Of course, the occurrence or
severity of a particular
drought or flood
in a particular location depends on a lot of things, including natural climate patterns like El Nino.
Sliding correlations between the Central Valley Palmer
drought severity index (PDSI) and the groundwater level (GW)
in the following year (1 - yr lag; solid line) and
in the same year (no lag; dashed line), computed with a 15 - year running window (one - sided).
resulting
in increased
severity and / or intensity of heat waves, heavy precipitation events,
droughts, tropical cyclones and extreme high sea levels [AR4 WGI SPM, p. 8],
Every month from December 2013 to July 2015 except one has been below − 4 on the Palmer
Drought Severity Index, indicating extreme
drought (Fig. 1A) and providing evidence that this was the driest period
in California from 1995 to 2015.
With increases
in temperatures,
drought severity likely will worsen, «implying that our results should be viewed as conservative,» the study reports.
A plot of the worldwide data for the Palmer
Drought Severity Index shows that there has been an unprecedented decrease in world drought severity over the past 30 years, possibly due to the plant enhancing increase
Severity Index shows that there has been an unprecedented decrease
in world
drought severity over the past 30 years, possibly due to the plant enhancing increase
severity over the past 30 years, possibly due to the plant enhancing increase of CO2.
Warming accelerates land - surface drying as heat goes into evaporation of moisture, and this increases the potential incidence and
severity of
droughts, which has been observed
in many places worldwide (Dai 2011).
The
Drought Monitor, updated weekly, shows areas and
severity of
drought in California as of January, 17, 2017.
And since we currently seem incapable of predicting when
droughts / floods will happen, or of what
severity they will be when they do (
in advance, that is), of what use are such «predictions»?
By the way, here is the Palmer
Drought Severity Index for California
in an historical perspective, which shows the recent
drought was not as deep as the one
in 1898.
These regions nevertheless experienced extended Medieval - era
droughts that were more persistent than any historical event, providing crucial targets
in the paleoclimate record for benchmarking the
severity of future
drought risks.
In the Southwest and Central Plains of Western North America, climate change is expected to increase drought severity in the coming decade
In the Southwest and Central Plains of Western North America, climate change is expected to increase
drought severity in the coming decade
in the coming decades.
Even if rainfall amounts don't change
in the future,
drought and wildfire
severity likely will because warmer temperatures are more efficient at evaporating what little moisture does fall.
``... For example, Sheffield and Wood (2008) found decreasing trends
in the duration, intensity and
severity of
drought globally.
The 1940s saw several minor
droughts — notably
in 1949 — but the 1950s were consistently wet and expansion of agriculture to feed growing populations characterised this decade and many have thought it contributed to the
severity of the subsequent Sahel
droughts
The Palmer
Drought Severity Index, which is a measure of soil moisture using precipitation measurements and rough estimates of changes
in evaporation, has shown that from 1900 to 2002, the Sahel region of Africa has been experiencing harsher
drought conditions.
California is experiencing warmer baseline conditions, driven by climate change, that have increased the frequency and
severity of arid conditions
in California, and increased the chance that low rainfall years will produce
drought.
The storm was
drought - related — and there may be more such storms to come, as global warming is expected to increase the frequency and
severity of
drought in southeastern Australia
in coming decades.1