(a) ERA-Interim wet bulb temperature (T) in India on 21 May 2016. (b) Monthly maximum of the wet bulb temperature in May 2016 (◦C). (c) Anomalies of the maximum wet bulb temperature in May 2016 (K), see text for details on the very high wet bulb temperatures in May 2016. (d–f) Same as (a–c) but for 22 May 2015. Graphic: Oldenborgh, et al., 2018 / Natural Hazards and Earth System Sciences

Graph of the Day: Wet bulb temperature in India during record heat wave, May 2016

24 January 2018 (Natural Hazards and Earth System Sciences) – On 19 May 2016 the afternoon temperature reached 51.0◦C in Phalodi in the northwest of India – a new record for the highest observed maximum temperature in India. The previous year, a widely reported very lethal heat wave occurred in the southeast, in Andhra Pradesh […]

Decadal mean changes of maximum near-surface air temperature (ΔTx) and wet-bulb temperature (ΔTW) for 30-year future periods in the Middle East and North Africa. The figure is generated using the results of the ensemble mean of 17 RCMs. Graphic: Ahmadalipour Moradkhani, 2018 / Environment International

Deadly heat waves in Middle East and North Africa to increase by 8–20 times if global warming isn’t slowed

By Ali Ahmadalipour and Hamid Moradkhani 12 May 2018 (Environment International) – Climate change will substantially exacerbate extreme temperature and heatwaves. The impacts will be more intense across the Middle East and North Africa (MENA), a region mostly characterized by hot and arid climate, already intolerable for human beings in many parts. In this study, daily […]

Standing perfectly still: no progress in replacing fossil fuels for the past twenty years

15 July 2018 (Desdemona Despair) – It’s well known that human population is increasing relentlessly, with no peak in sight for at least the next century. Various projections estimate that the population will be somewhere in the neighborhood of ten to twelve billion by the year 2100 (cf. New projection shows human population could reach […]

Global warming has quadrupled ocean dead zones – “The decline in ocean oxygen ranks among the most serious effects of human activities on the Earth’s environment”

4 January 2018 (SERC) – In the past 50 years, the amount of water in the open ocean with zero oxygen has gone up more than fourfold. In coastal water bodies, including estuaries and seas, low-oxygen sites have increased more than 10-fold since 1950. Scientists expect oxygen to continue dropping even outside these zones as […]

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 […]

Temporal distribution of insect biomass at selected locations in nature protection areas in Germany, 1989-2016. (A) Daily biomass (mean ±1 se) across 26 locations sampled in multiple years (see S4 Fig for seasonal distributions). (B) Distribution of mean annual rate of decline as estimated based on plot specific log-linear models (annual trend coefficient = −0.053, sd = 0.002, i.e. 5.2% annual decline). Graphic: Hallmann, et al., 2017 / PLOS ONE

Three-quarters of the total insect population lost in protected nature reserves – “Whatever the causal factors responsible for the decline, they have a far more devastating effect on total insect biomass than has been appreciated previously”

18 October 2017 (IWWR) – Since 1989, in 63 nature reserves in Germany the total biomass of flying insects has decreased by more than 75 percent. This decrease has long been suspected but has turned out to be more severe than previously thought. Ecologists from Radboud University together with German and English colleagues published these […]

Raging wildfire north of downtown Los Angeles grows to one of the largest blazes in city history

By Ruben Vives, Andrea Castillo, and Alene Tchekmedyian 2 September 2017 (The Los Angeles Times) – A brush fire in the Verdugo Mountains north of downtown Los Angeles has burned more than 5,000 acres, making it one of the largest fires in the city’s history and one that officials warn could grow larger if erratic weather […]

Histograms of daily maximum wet-bulb temperature, TWmax (°C), and maps of the ensemble averaged 30-year TWmax. (A) The histograms are generated for the most populous cities in the selected regions for each scenario: HIST (blue), RCP4.5 (green), and RCP8.5 (red). Values within each panel correspond to the 2- and 25-year return period of the bias-corrected annual maxima of TWmax, and the x and y axes indicate TWmax (°C) and the number of occurrences on a logarithmic scale, respectively. The background image was obtained from NASA Visible Earth. (B to D) The spatial distributions of bias-corrected ensemble averaged 30-year TWmax for each GHG scenario: HIST (1976–2005) (B), RCP4.5 (2071–2100) (C), and RCP8.5 (2071–2100) (D). Graphic: Im, et al., 2017 / Science Advances

Climate change to cause humid heatwaves that will kill even healthy people

By Damian Carrington 2 August 2017 (The Guardian) – Extreme heatwaves that kill even healthy people within hours will strike parts of the Indian subcontinent unless global carbon emissions are cut sharply and soon, according to new research. Even outside of these hotspots, three-quarters of the 1.7 billion population – particularly those farming in the Ganges […]

The world is about to install 700 million air conditioners – “Demand for cooling, particularly in hot climates, is going to be an incredible driver of electricity requirements”

By Chris Mooney and Brady Dennis 31 May 2016 (Washington Post) – As summer temperatures finally settle in, many in the United States take it for granted that they can dial down the thermostat: Americans use 5 percent of all of their electricity cooling homes and buildings. In many other countries, however — including countries […]

Estimated disruptions to Earth’s great elemental cycles

23 March 2016 (Desdemona Despair) – Back in 2011, Desdemona was asked by a local church to give a presentation on the condition of the world’s oceans (State of the Oceans 2011 video; pdf slide deck; PowerPoint). As part of the talk, Des wanted estimates for human disturbances to the great cycles of elements on […]

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