Profile picture
Peter Gleick @PeterGleick
, 7 tweets, 6 min read Read on Twitter
Water Thread from the new National Climate Assessment (#NCA4).

Explicit changes in water quantity & quality from human-caused climate change are already evident in the US.

Source: #NCA4, Chapter 3: Water.
Changes in the frequency & intensity of climate extremes are already underway. Climate change is already leading to changes in the frequency, duration, & geographic distribution of severe storms, floods, & droughts. #water #climate #NCA4
Variable precipitation & rising temperature are intensifying droughts, increasing heavy downpours, & reducing snowpack.
Reduced snow-to-rain ratios are affecting the timing of both water supply & demand.
#water #climate #NCA4
Groundwater depletion is worsening the consequences of drought. Surface #water quality is declining as water temperatures rise & more frequent high-intensity rainfall events mobilize pollutants. Glaciers continue to melt in Alaska & the western United States.
#climate #NCA4
Increasing air temperatures have substantially reduced the fraction of winter precipitation falling as snow, particularly over the western United States. Warming has resulted in a shift in the timing of snowmelt runoff to earlier in the year.
#water #climate #NCA4
Heavy precipitation events in most parts of the United States have increased in both intensity & frequency since 1901 & are projected to continue to increase over this century under both a lower & higher emissions scenario, raising flood risks.
#water #climate #NCA4
Higher temperatures are leading to an increased human use of #water, particularly through higher water demand for agriculture by increase evapotranspiration, threatening farmers and food production.
#climate #NCA4
Missing some Tweet in this thread?
You can try to force a refresh.

Like this thread? Get email updates or save it to PDF!

Subscribe to Peter Gleick
Profile picture

Get real-time email alerts when new unrolls are available from this author!

This content may be removed anytime!

Twitter may remove this content at anytime, convert it as a PDF, save and print for later use!

Try unrolling a thread yourself!

how to unroll video

1) Follow Thread Reader App on Twitter so you can easily mention us!

2) Go to a Twitter thread (series of Tweets by the same owner) and mention us with a keyword "unroll" @threadreaderapp unroll

You can practice here first or read more on our help page!

Did Thread Reader help you today?

Support us! We are indie developers!

This site is made by just three indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member and get exclusive features!

Premium member ($30.00/year)

Too expensive? Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal Become our Patreon

Thank you for your support!