The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured these images of several fires burning in the states of Rondônia, Amazonas, Pará, and Mato Grosso on 13 August 2019. Data: MODIS data from NASA EOSDIS/LANCE and GIBS/Worldview and VIIRS data from NASA EOSDIS/LANCE and GIBS/Worldview, and the Suomi National Polar-orbiting Partnership Photo: Lauren Dauphin / NASA Earth Observatory

Image of the Day: Satellite view of forest-clearing fires in the Amazon, August 2019

By Adam Voiland 16 August 2019 (NASA) – In the Amazon rainforest, fire season has arrived. The Moderate Resolution Imaging Spectroradiometer (MODIS) on NASA’s Aqua satellite captured these images of several fires burning in the states of Rondônia, Amazonas, Pará, and Mato Grosso on August 11 and August 13, 2019. In the Amazon region, fires are rare for much […]

Excitation near the saddle-node bifurcation and steady-state solutions for global carbon cycle model. Graphic: Rothman, 2019 / PNAS

Breaching carbon threshold could lead to mass extinction – Carbon dioxide emissions may trigger “reflex” in global carbon cycle, with devastating consequences

By Jennifer Chu 8 July 2019 (MIT News) – In the brain, when neurons fire off electrical signals to their neighbors, this happens through an “all-or-none” response. The signal only happens once conditions in the cell breach a certain threshold. Now an MIT researcher has observed a similar phenomenon in a completely different system: Earth’s […]

Large rivers of melting water form on an ice sheet in western Greenland on 1 August 2019 and drain into moulin holes that empty into the ocean from underneath the ice. The heat wave that smashed high temperature records in five European countries a passed over Greenland, accelerating the melting of the island's ice sheet and causing massive ice loss in the Arctic. Photo: Caspar Haarløv / Into the Ice / AP

Bizarre happenings in the Arctic: Lightning, tropical moisture, and more

By Bob Henson 14 August 2019 (Weather Underground) – You’ll have to forgive the Arctic. It’s had a rough summer. Sea ice is running neck and neck with 2012 for the lowest values on record for this time of year. Wildfires are ringing the Arctic, pouring more carbon dioxide into the air than in any comparable period in 17 […]

Animation showing the concentration of black carbon particulates — commonly called soot — around the Arctic from 1 July 2019 to 29 July 2019. Graphic: Lauren Dauphin / NASA Earth Observatory

Arctic fires fill Northern Hemisphere skies with soot

By Kasha Patel 1 August 2019 (NASA) – In June and July 2019, more than 100 long-lived and intense wildfires blazed within the Arctic Circle. Most of them burned in Alaska and Siberia, though a few raged even in Greenland. As these fires lofted thick plumes of smoke into the skies, they also launched megatons of tiny, harmful particles into the […]

Remote sensing imagery of discolored water and algal blooms in the Florida Bay and the Florida Keys region between 1992 and 2013 showing connectivity of the mainland and the lower Florida Keys, all outlined in red. (a) Landsat true color image on 29 May 1992 shows turbid water in western Florida Bay and discolored, black water in central Florida Bay that extends southward to the lower Florida Keys; (b) AVHRR reflectance image on 12 March 1996 shows high turbidity from the Shark River Slough plume extending beyond the lower Florida Keys towards Dry Tortugas; (c, d) VIIRS chlorophyll a anomaly images show phytoplankton blooms off Shark River Slough reaching the lower Florida Keys that were partially composed of the cyanobacterium, Synechococcus, on (c) 24 November 2013 and (d) 27 January 2014. Graphic: Lapointe, et al., 2019 / Marine Biology

Nutrient loading lowers resistance to thermal stress in Florida Keys corals – “These data make clear that this is not an ‘either temperature or nutrients’ situation, but rather a ‘both/and’ combination of multiple stressors”

By Gisele Galoustian 15 July 2019 (FAU) – Coral reefs are considered one of the most threatened ecosystems on the planet and are dying at alarming rates around the world. Scientists attribute coral bleaching and ultimately massive coral death to a number of environmental stressors, in particular, warming water temperatures due to climate change. A […]

Satellite view of forest loss in the Madre de Dios region of southeastern Peru, on 6 September 2018 NASA. Photo: Earth Observatory

Image of the Day: Satellite view of deforestation in Peru’s Madre de Dios region

By by Andrea Nicolau, Andi Thomas, and Leah Kucera 18 April 2019 (NASA) – Considered a hotspot for biodiversity, the Madre de Dios region of southeastern Peru is an exceptionally fertile landscape. Standing at the edge of the Amazon basin, Madre de Dios has a rich concentration of endemic species—plants and animals that are found nowhere […]

Sumatra region heats up as rainforests are razed for palm oil plantations – “The land use change does not only impact biodiversity and stored carbon, but also has a surface warming effect, adding to climate change”

By Hans Nicholas Jong 29 October 2017(Mongabay) – The wholesale destruction of rainforests across parts of Indonesia’s Sumatra island to make way for cash-crop plantations has not just devastated animal and plant biodiversity in the region, but may also be driving an alarming rise in temperatures on the ground, a new study suggests. Average temperatures […]

Michael Mann: I’m a scientist who has gotten death threats. I fear what may happen under Trump.

By Michael E. Mann 16 December 2016 (Washington Post) – My Penn State colleagues looked with horror at the police tape across my office door. I had been opening mail at my desk that afternoon in August 2010 when a dusting of white powder fell from the folds of a letter. I dropped the letter, […]

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