If we limit global warming to 1.5°C rather than 2°C above the pre-industrial levels by the year 2100, the impacts of climate change would be much less dramatic, a new study says. According to the researchers, for vertebrates and plants, the number of species losing more than half their geographic range by 2100 will be halved when warming is limited to 1.5°C, compared with projected losses at 2°C. It would be even better for insects, the most diverse group of animals on Earth: the number is reduced by two-thirds.Continue reading Most species hold their geographic range if we limit global warming to 1.5°C, study says
According to measurements from Mauna Loa Observatory in Hawaii, with 410.31 ppm (parts per million), the level of carbon dioxide in Earth’s atmosphere hit a new high in April 2018. This is the highest point for the last 800,000 years.
Last year’s (April 2017) value, 409.00 ppm, was also a record high. As you can see in the graph below, which shows recent monthly mean carbon dioxide measured at Mauna Loa Observatory, Hawaii, it’s a continuing trend.Continue reading Atmospheric Carbon Dioxide Reached the Highest Levels in 800,000 years
The dynamics of the ocean and the atmosphere are strongly influenced by the Earth’s rotation. Currently, our planet rotates from west to east (prograde, which appears counterclockwise) with a linear velocity of 465.1013 m/s (1674.365 km/h or 1040.40 mph) at the equator. What would happen if the Earth started spinning backward (from east to west)?Continue reading What Would Happen If the Earth Started Spinning Backward?
The future of our carbon dioxide and greenhouse gas emissions will decide how many degrees will planet Earth be warmer by 2100 (relative to pre-industrial temperatures). Using the data from Climate Action Tracker, the online publication that shows how living conditions are changing, Our World In Data has published a chart showing future greenhouse gas emission scenarios and how each scenario would result in an estimated global warming by 2100.Continue reading Global Warming: Future greenhouse gas emission scenarios
You can help NASA on some projects: for instance, citizen scientists helped NASA identify an aurora-related celestial phenomenon, now called STEVE. Want to become a citizen scientist? You can find projects on the
Iceland was extensively forested when it was first settled. When the Vikings first arrived in the 9th century, the Nordic island was covered in 25 to 40 percent forest, compared to 1% in the present day. In the late 12th century, Ari the Wise (Ari Thorgilsson, 1067–1148 AD), Iceland’s most prominent medieval chronicler, described it in the Íslendingabók (Book of Icelanders Notes 1) as “forested from mountain to sea shore”. Unfortunately, after the permanent human settlement, the forests were heavily exploited for firewood, timber and to make room for farming. Within a few centuries, almost all of Iceland’s trees were gone. This rapid deforestation has resulted in massive soil erosion that puts the island at risk for desertification. Today, many farms have been abandoned. Three-quarters of Iceland’s 100,000 km2is affected by soil erosion, 18,000 km2 (6,900 sq mi) serious enough to make the land useless.
Today, the Icelandic Forest Service Notes 2 has taken on the mammoth task of bringing back the woodlands. They plant around three million seedlings each year in the island’s soil. With the help of forestry societies and forest farmers, Iceland’s trees are slowly beginning to make a comeback. But there are many difficulties. For example, as the climate getting warmer, the winters have become milder. As a result, many of the trees planted back in the 1950s, especially Siberian larch (Larix
Today I stumbled upon on a beautiful web site: the Climate Reanalyzer. In fact, Chris Hadfield, the retired Canadian astronaut and also who was the first Canadian to walk in space, tweeted about the web site, saying “The current bulge of cold”. Then I visited the web site and found it really informative.
The sea ice cover blanketing the Arctic Ocean and nearby seas thickens and expands during the fall and winter each year. It reaches its maximum yearly extent in February or March. This year (2018), on March 17, the Arctic sea ice cover peaked at only 5.59 million square miles (14,478,033.54 km2), the 2nd lowest max on record. It is only about 23,200 square miles (60,000 square kilometers) larger than the record low maximum reached in last year, on March 7, 2017.
This continues a trend of shrinking sea ice, with the four lowest Arctic sea ice maximum extents on record in the last four years. In the video published by the NASA Goddard Channel, Climatologist,
As a result of the global warming, the seas warm and ice melts. Naturally, Earth’s oceans have risen steadily – or at least, it was thought so. According to a new study based on 25 years of NASA and European satellite data, rather than increasing steadily, global sea level rise has been accelerating in recent decades. If this trend continues, by the year 2100, sea level rise will be around 65 cm (25.6 in), twice as big as previously thought. This is more than enough to cause significant problems for coastal cities.
Satellite altimetry Notes 1 has shown that since 1993, global mean sea level has been rising at a rate of ∼3 ± 0.4 millimeters per year. Researchers show that this rate is accelerating at 0.084 ± 0.025 mm/y2, which agrees well with climate model projections. This acceleration is driven mainly by increased melting in Greenland and Antarctica because of global warming. If sea level continues to change at this rate and acceleration, sea-level rise by 2100 (∼65 cm ± 12 cm, compared with 2005) will be more than double the amount if the rate was constant at 3 mm/y, researchers conclude.Continue reading Global Sea Level Rise Accelerating, New Study Finds
According to the analyses of NASA and NOAA (National Oceanic and Atmospheric Administration) data, long-term global warming trend continued in 2017. According to NASA, Earth’s global surface temperatures in 2017 ranked as the second warmest since 1880. NOAA scientists concluded that 2017 was the third-warmest year in their record, in a separate, independent analysis. Both agencies’ records remain in strong agreement: our planet is still getting warmer rapidly. The minor difference in rankings is due to the different methods used by the two agencies to analyze global temperatures. Both analyses also show that the five warmest years on record all have taken place since 2010.
According to NASA data, globally averaged temperatures in 2017 were 1.62 degrees Fahrenheit (0.90 degrees Celsius) warmer than 1951 to 1980 mean That is second only to global temperatures in 2016. However, 2017 was the warmest year without an El Niño. Earth’s surface temperatures in 2017 were the second warmest since