Landsat 8 images from 21 July 2018 (left) and 16 September 2018 (right) illustrating the Taku Glacier transient snowline. The 21 July 2018 snowline is at 975 m and the 16 September 2018 snowline is at 1400 m. Average end-of-summer snowline is 975 m; the 2018 end-of-summer snowline was the highest observed in the 73-year record. Graphic: AMS

State of the Climate in 2018: 2018 was the fourth-hottest year on record, behind 2016, 2015, and 2017

12 August 2019 (NCEI) – A new State of the Climate report [pdf] confirmed that 2018 was the fourth warmest year in records dating to the mid-1800s. Last year was the fourth warmest year on record despite La Niña conditions early in the year and the lack of a short-term warming El Niño influence until […]

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 […]

Free air CO2 enrichment experiments using native Australian forests. Elevated CO2 levels are used to examine the effects on native forests, animals, soils and grasses. Photo: Western Sydney University

Leaving microbes out of climate change conversation has major consequences, experts warn – “Climate change is literally starving ocean life”

By Ivy Shih 19 June 2019 (UNSW) – An international group of leading microbiologists have issued a warning, saying that not including microbes – the support system of the biosphere – in the climate change equation will have major negative flow-on effects. More than 30 microbiologists from 9 countries have issued a warning to humanity […]

Fine-resolution transect across the abyssal boundary current near the Orkney Passage sill, showing squared vertical shear (color), neutral density (black contours), and rate of turbulent kinetic energy dissipation (ε, shaded bars). Graphic: Garabato, et al., 2019 / PNAS

First “Boaty McBoatface” outing sheds new light on the warming ocean abyss

17 June 2019 (University of Southampton) – The first mission involving the autonomous submarine vehicle Autosub Long Range (better known as Boaty McBoatface) has for the first time shed light on a key process linking increasing Antarctic winds to rising sea temperatures. Data collected from the expedition, published today in the scientific journal PNAS, will […]

Spatial patterns of projected biomass changes. Shown are global ensemble projections at a 1 × 1 degree resolution for (A, C, and E) RCP2.6 and (B, D, and F) RCP8.5. (A and B) Multimodel mean change (percent, n = 10) in total marine animal biomass in 2090–2099 relative to 1990–1999 without fishing. (C and D) Variability among different ecosystem model and ESM combinations expressed as 1 SD. (E and F) Model agreement (percent) on the direction of change. Graphic: Lotze, et al., 2019 / PNAS

Study projects substantial declines in large fish and marine species with warming oceans – “There are substantial consequences for marine ecosystems on a global scale”

By Alison Auld 11 June 2019 (Dal News) – Populations of large fish and other marine species will decline steadily if little is done to stem the effects of climate change, according to a study led by Dalhousie University researchers that shows how greenhouse gas emissions could cause widespread global stock losses and habitat shifts. […]

Deepest-ever sub dive in Mariana Trench finds plastic bag and candy wrappers

By Rebecca Morelle 13 May 2019 (BBC News) — An American explorer has found plastic waste on the seafloor while breaking the record for the deepest ever dive. Victor Vescovo descended nearly 11km (seven miles) to the deepest place in the ocean – the Pacific Ocean’s Mariana Trench. He spent four hours exploring the bottom […]

Loss of marine stratocumulus clouds could trigger a mega-hothouse climate – “Transitions to a much warmer climate may occur in the future if CO2 levels continue to rise”

Loss of marine stratocumulus clouds could trigger a mega-hothouse climate – “Transitions to a much warmer climate may occur in the future if CO2 levels continue to rise”

By Dr. Jeff Masters 6 May 2019 (Weather Underground) – If humanity maintains its current business-as-usual emissions path for the next 100 years, the resulting 4°C (7°F) of warming may be enough to cause highly reflective stratocumulus clouds over the subtropical and tropical oceans to disintegrate, resulting in an additional 8°C (14°F) of warming, according […]

North Atlantic Ocean phytoplankton decline coincides with warming temperatures over the last 150 years – “10 percent of the marine food base in this region has been lost over the industrial era”

North Atlantic Ocean phytoplankton decline coincides with warming temperatures over the last 150 years – “10 percent of the marine food base in this region has been lost over the industrial era”

By Jennifer Chu 6 May 2019 (MIT News) – Virtually all marine life depends on the productivity of phytoplankton — microscopic organisms that work tirelessly at the ocean’s surface to absorb the carbon dioxide that gets dissolved into the upper ocean from the atmosphere. Through photosynthesis, these microbes break down carbon dioxide into oxygen, some […]

Going 100 percent renewable power means a lot of dirty mining – “If not managed responsibly, this has the potential for new adverse environmental and social impacts”

By Naveena Sadasivam 17 April 2019 (Grist) – For more than a decade, indigenous communities in Alaska have been fighting to prevent the mining of copper and gold at Pebble Mine in Bristol Bay, home to the world’s largest sockeye salmon fishery and a crucial source of sustenance. The proposed mine, blocked under the Obama […]

Turtles’ absence from Nicaragua stronghold raises alarm for future – “It is heartbreaking to think that all of the conservation efforts could be in vain”

Turtles’ absence from Nicaragua stronghold raises alarm for future – “It is heartbreaking to think that all of the conservation efforts could be in vain”

By Lindsay Fendt 15 April 2019 (The Guardian) – Every year, from November through March, leatherback sea turtles arrive to the secluded shores of the Río Escalante Chacocente wildlife reserve on Nicaragua’s Pacific coast to lay their eggs. Though leatherback nesting habits vary, Chacocente has been a reliable egg-laying site for as long as conservationists […]

Social media & sharing icons powered by UltimatelySocial