Thursday 24th of June 2021

climate change is still on...

sand storm

Despite a small industrial reduction in emissions due to Covid-19, There is still enough EXTRA CO2 in the atmosphere to increase average global temperatures by 6 degrees Celsius by 2150. Any EXTRA emissions of CO2, methane and NOxs gases ADDED till 2050 (or when the countries of the world manage ZERO emissions) will compound the temperature rise of the atmosphere and the rise of sea levels, which by 2150 could be 6 metres above present levels.


Despite present apparent cooling of the temperate regions, due to an expanding weaker warming polar vortex in the northern hemisphere and a cooler than average summer in the southern hemisphere due to La Niña, under he influence of a melting Antarctica, the total processes of planetary warming are still on.


Amongst measured phenomenons, already note is an "abrupt shift to hotter and drier climate over East Asia beyond the tipping point."





Biggest sandstorm in decade sweeps northern China


A sand and dust storm from Mongolia swept through northern areas of China on Monday and led to the suspension of classes at schools and flight cancellations.

The sandstorm was the strongest in nearly a decade and affected 12 provincial-level regions in northern China, according to the National Meteorological Center.

Remote sensing images showed the storm covered an area of 466,000 square kilometers, including Beijing and Tianjin, the Inner Mongolia autonomous region and Hebei, Shanxi, Gansu, Shaanxi, Liaoning, Jilin and Heilongjiang provinces.

Visibility remained lower than 500 meters in some areas of northern China as the center issued a yellow alert, the lowest level in the three-tier weather alert system, on Monday morning.

At 8 pm on Monday, the level of PM10 particles in Beijing dropped to 864 micrograms per cubic meter in six major urban districts, down from 8,108 micrograms per cubic meter at 9 am, according to the Beijing Ecological and Environment Monitoring Center.

Dust and snowstorms are frequent in the spring in Mongolia.

At least nine people were killed in a heavy dust and snowstorm in Mongolia over the weekend, the country's National Emergency Management Agency said on Monday.

The Mongolian agency said that 579 of the 590 people who got lost in the storm were found alive.

Searches were underway for the remaining missing people, it said.


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Although sand storms in China have happened before, they are now exacerbated by the "abrupt shift to hotter and drier climate over East Asia beyond the tipping point".


Picture at top:  Commuters brave a sandstorm in Beijing on Monday. The capital, together with many regions in northern China, experienced the strongest sandstorm in nearly a decade, according to the National Meteorological Center. FENG YONGBIN/CHINA DAILY




beyond the tipping point...


Global warming has led to a shift in the probability distribution of summer temperatures (1), causing more frequent summer heatwaves in the Northern Hemisphere midlatitudes (2, 3). Diverse and complex regional or global feedback mechanisms determine the magnitude of changes in heatwave frequency and regionality (4–9). In addition to the emergence of heatwave-prone atmospheric stagnation, soil moisture deficit before or during droughts has been identified as a key factor exacerbating heatwaves through the land-atmosphere coupling (10–14). This drought-heatwave interaction is particularly pronounced in semiarid regions such as southern Europe, western North America, and inner East Asia (Mongolia and northern China), where the land-atmosphere coupling is strong (15–20).

Although increasing concentration of greenhouse gases may enhance soil moisture deficits and heatwave occurrences in a warmer climate (21–23), the extent to which summer heatwaves are affected by the global warming–induced soil moisture reduction in a long-term context remains unclear. In this study, we used tree-ring data to reconstruct both heatwave frequency and soil moisture variability in inner East Asia, centered over Mongolia, for the past 260 years. We found a robust tendency toward a hotter and drier climate, with a stronger coupling of heatwave and drought in recent decades that was not observed before the 1990s. This trend, which was found in both observations and reconstructions, is likely associated with an enhanced land-atmosphere coupling associated with persistent soil moisture deficit.

Inner East Asia, including Mongolia and its surroundings (Fig. 1), features arid and semiarid climates where annual precipitation is <300 mm. It is one of the hotspots showing the strongest warming in the latter part of the 20th century (24). The frequency of summer heatwaves in this region has increased significantly during the past two decades (Fig. 1A). Concurrently, soil moisture content has shown a significant drying trend (Fig. 1B), which is consistent with previous studies based on observation and land surface modeling (25–27) (also see fig. S1).



drier hotter


Science  27 Nov 2020:

Vol. 370, Issue 6520, pp. 1095-1099

more sandstorms...

Construction workers are seen in front of the CCTV headquarters shrouded in dust as the city is hit by a sandstorm, in Beijing, China March 28, 2021.

Sandstorm Descends on Beijing – Video


While the storm is expected to abate by Sunday night, chief weather forecaster at Beijing's Meteorological Station warned that the dust may return on Monday. 

A powerful sandstorm hit Beijing this weekend, with strong winds and dust sweeping across the streets of the China’s capital.

According to China Daily, Beijing's Municipal Observatory issued gale force wind and dust alerts on Saturday morning.

Zhang Linna, chief weather forecaster at the Beijing Meteorological Station, said while the wind will drop by Sunday night, "some dust may blow back on Monday afternoon due to the wind shifting to the south."

Zhang also advised the public to keep their windows and doors closed during the sandstorm, and urged children, the elderly, and people suffering from respiratory allergies to "reduce their outdoor activities."

Videos of the extreme weather have been posted on social media.

Beijing was enveloped in thick dust carrying high levels of hazardous particles as a second sandstorm in two weeks hit the city due to winds from Mongolia and northwestern China

— Reuters (@Reuters) March 28, 2021


Another #sandstorm moves through Beijing now.
The white Sun I filmed right now in the Ming Dynasty Wall Relics Park, the only existing city wall of original Beijing inner city, over 550 years old, 1.5 km long.

— Tong Bingxue 仝冰雪 (@tongbingxue) March 28, 2021


#Beijing #Sandstorm
One more shot on the Wall:

— Tong Bingxue 仝冰雪 (@tongbingxue) March 28, 2021




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