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mattsmith48
August 17th, 2017, 12:11 AM
In this week edition of climate change is happening and we are all fucked unless we do something about it. We got a couple updates from NASA, first July 2017 was the hottest month on record tying July and August 2016. The second is an article about a study that found that drought recoveries are taking longer and why that's bad. Enjoy :)

July 2017 has narrowly topped July 2016 as the hottest July on record, according to a shocking analysis by scientists at NASA’s Goddard Institute for Space Studies (GISS) released Tuesday. As a result, July 2017 is statistically tied with August 2016 (and July 2016) as the hottest month on record.

What’s so surprising here is that records for warmest month or year almost invariably occur when the underlying human-caused global warming trend gets a temporary boost from an El Niño’s enhanced warming in the tropical Pacific.

But whereas 2016 set its temperature records boosted by one of the strongest El Niño’s on record, 2017 is setting records in the absence of any El Niño at all.

“Yes, it’s surprising that July 2017 tied for warmest month on record despite not having the El Nino assist of July and August 2016,” prominent climatologist Michael Mann wrote in an email to ThinkProgress. “The extreme warmth of the Antarctic peninsula is particularly worrying given the disintegration of the Larsen C ice shelf we’ve been hearing so much about.”

NASA charts exactly where it was hot in July compared to the 1951-1980 average (see map below). Note that to show the extreme warming around Antarctica, the high end of the temperature legend had to be extended to a whopping 8°C (14.4°F).
When we see all-time global temperature records in the absence of any El Niño, that sends a message the underlying global warming trend is stronger than ever — and that we are running out of time to stop catastrophic impacts.

NOTE: NOAA releases its own monthly temperature report in a few days using slightly different data so it is possible they will have a different ranking for July 2017.

https://thinkprogress.org/hottest-july-on-record-369505237992/

As global temperatures continue to rise, droughts are expected to become more frequent and severe in many regions during this century. A new study with NASA participation finds that land ecosystems took progressively longer to recover from droughts in the 20th century, and incomplete drought recovery may become the new normal in some areas, possibly leading to tree death and increased emissions of greenhouse gases.

In results published Aug. 10 in the journal Nature, a research team led by Christopher Schwalm of Woods Hole Research Center, Falmouth, Massachusetts, and including a scientist from NASA's Jet Propulsion Laboratory, Pasadena, California, measured recovery time following droughts in various regions of the world. They used projections from climate models verified by observations from the Moderate Resolution Imaging Spectroradiometer (MODIS) instrument on NASA's Terra satellite and ground measurements. The researchers found that drought recovery was taking longer in all land areas. In two particularly vulnerable regions — the tropics and northern high latitudes — recovery took ever longer than in other regions.

Schwalm noted that in model projections that assumed no new restrictions on greenhouse gas emissions (the so-called business-as-usual scenario), "Time between drought events will likely become shorter than the time needed for land ecosystems to recover from them."

"Using the vantage point of space, we can see all of Earth's forests and other ecosystems getting hit repeatedly and increasingly by droughts," said study co-author Josh Fisher of JPL. "Some of these ecosystems recover, but, with increasing frequency, others do not. Data from our 'eyes' in space allow us to verify our simulations of past and current climate, which, in turn, helps us reduce uncertainties in projections of future climate."

The scientists argue that recovery time is a crucial metric for assessing the resilience of ecosystems, shaping the odds of crossing a tipping point after which trees begin to die. Shorter times between droughts, combined with longer drought recovery times, may lead to widespread tree death, decreasing the ability of land areas to absorb atmospheric carbon.

https://climate.nasa.gov/news/2617/study-finds-drought-recoveries-taking-longer/

Dalcourt
August 17th, 2017, 11:07 AM
Uh no...not again. Apart from the easily triggered right wing snowflakes ever one knows that climate change is real.