Climate Change ☀️
Here Are America’s Top Methane Emitters. Some Will Surprise You.
Oil and gas giants are selling off their most polluting assets to small private companies. Most manage to escape public scrutiny. Now, these companies are becoming the country’s biggest emitters of greenhouse gases.

Five of the industry’s top 10 emitters of methane, a particularly potent planet-warming gas, are little-known oil and gas producers, according to a new analysis. Topping the list is Hilcorp Energy, which has grown by buying up old oil and gas assets. These companies have largely escaped public scrutiny, even as they have become major polluters.
Read the full article: https://www.nytimes.com/2021/06/02/climate/biggest-methane-emitters.html

Newly identified atmospheric circulation enhances heatwaves and wildfires around the Arctic
Scientists have uncovered a summertime climate pattern in and around the Arctic that could drive co-occurrences of European heatwaves and large-scale wildfires with air pollution over Siberia and subpolar North America.

In recent years in summer, there have often been extremely high temperatures over Europe, including heatwaves and active wildfires in and around the Arctic such as Siberia and subpolar North America (Alaska and Canada), which have caused widespread air pollution. For instance, in July 2019, significant Alaskan wildfires were detected by satellites. The recent unusual climate phenomena are of immense concern to many people living in these regions.
Read the full article: https://www.sciencedaily.com/releases/2021/06/210602091430.htm

A 'jolt' for ocean carbon sequestration
Global oceans absorb about 25 percent of the carbon dioxide released into the atmosphere when fossil fuels are burned. Electricity-eating bacteria known as photoferrotrophs could provide a boost to this essential process, according to new research.
Read the full article: https://www.sciencedaily.com/releases/2021/06/210602101622.htm

Salps fertilize the Southern Ocean more effectively than krill
The iron released by the tunicates' fecal pellets is more bioavailable than that from krill pellets Experts at the Alfred Wegener Institute have, for the first time, experimentally measured the release of iron from the fecal pellets of krill and salps under natural conditions and tested its bioavailability using a natural community of microalgae in the Southern Ocean. In comparison to the fecal pellets of krill, Antarctic phytoplankton can more easily take up the micronutrient iron from those produced by salps. Observations made over the past 20 years show that, as a result of climate change, Antarctic krill are increasingly being supplanted by salps in the Southern Ocean. In the future, salps could more effectively stimulate the fixation of the greenhouse gas carbon dioxide in Antarctic microalgae than krill.
Read the full article: https://www.sciencedaily.com/releases/2021/06/210602130341.htm

Dead zones formed repeatedly in North Pacific during warm climates
An analysis of sediment cores from the Bering Sea has revealed a recurring relationship between warmer climates and abrupt episodes of low-oxygen 'dead zones' in the subarctic North Pacific Ocean over the past 1.2 million years. The findings provide crucial information for understanding the causes of low oxygen or 'hypoxia' in the North Pacific and for predicting the occurrence of hypoxic conditions in the future.
Read the full article: https://www.sciencedaily.com/releases/2021/06/210602153410.htm

Climate change, periodic modification of Earth’s climate brought about as a result of changes in the atmosphere as well as interactions between the atmosphere and various other geologic, chemical, biological, and geographic factors within the Earth system.

Source: Climate change - Evidence for climate change | Britannica
Climate Change is the defining issue of our time and we are at a defining moment. From shifting weather patterns that threaten food production, to rising sea levels that increase the risk of catastrophic flooding, the impacts of climate change are global in scope and unprecedented in scale. Without drastic action today, adapting to these impacts in the future will be more difficult and costly.

Source: Climate Change | United Nations