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NASA, NOAA: 2014 Was the Warmest Year In the Modern Record
Titus Andronicus writes: NASA and the National Oceanic and Atmospheric Administration both announced today that 2014 was the warmest year in the instrumental temperature record, surpassing the prior winners, 2010 and 2005. NASA also released a short video. They said, "Since 1880, Earth’s average surface temperature has warmed by about 1.4 degrees Fahrenheit (0.8 degrees Celsius), a trend that is largely driven by the increase in carbon dioxide and other human emissions into the planet’s atmosphere. The majority of that warming has occurred in the past three decades. ... While 2014 temperatures continue the planet’s long-term warming trend, scientists still expect to see year-to-year fluctuations in average global temperature caused by phenomena such as El Niño or La Niña. These phenomena warm or cool the tropical Pacific and are thought to have played a role in the flattening of the long-term warming trend over the past 15 years. However, 2014’s record warmth occurred during an El Niño-neutral year."
No, the warming after the last ice again stopped a few thousand years ago. The current (much faster) warming is a very recent event.
wow. and you wonder why people like me (skeptics, not deniers) find it hard to take you seriously when you resort to lambasting people for asking questions. I didnt know nature was fox news..... http://www.nature.com/ngeo/foc... As I said. im not saying that nothing is happening. im saying that making the claim that it has been going on for 30 years... when you can find information that , if I am reading it correctly, states it has not been warming for the past 20 years causes concern on the believably of such claims.
have you seen my sig? there are many others like it but none that are the same
Yes you are missing something extremely important. This rate is about 36 times faster than ever recorded in the history of the planet, probably with the exception of local conditions associated with asteroid or large meteor impacts. The last major spike in global temperatures occurred in during the Paleocene-Eocene Thermal Maximum that occurred about 55 million years ago. In a very brief period of time, geologically speaking, the Earth warmed about 5.6 C in a period as short as 10,000 years. During this brief period over half of the species of North American mammals went extinct and places like Wyoming, not exactly known for hot weather, went from having redwood forests to having palm forests. Today with far more discontinuous habitats extinction rates of plants and animals will be very much higher.
Keep in mind that in that roughly 150 year period we are talking about because of increased carbon dioxide concentrations, the world oceans are now 30% more acidic than they were then. The next 100 years will see a another 30% decrease in Hydronium ion concentrations even if humans don't add a single extra molecule of carbon dioxide themselves as the amount already in the atmosphere will take some time to reach equilibrium with that already there. However, the reality is that although the baseline of annual carbon dioxide production by all the volcanoes in the world is about 250,000,000 metric tons, the amount humans now produce annually is 33,000,000,000 tons, so it is highly unlikely that humans will turn this around soon. Considering that humans obtain about 50% of its protein from seafood, in all likelihood, humans face the prospect of loosing half their protein supply in as little as 300 years based on present trends as many areas in the world oceans are already reaching pH levels that are killing off pteropods, one of the primary links in marine food chains.
Who, exactly, says there has been no warming in the last 20 years and is calling this a "warming hiatus?
I live ze unknown. I love ze unknown. I am ze unknown.
You can download the code they use for the calculations. Feel free to analyze it, and write a paper about any flaws you find. http://data.giss.nasa.gov/gist...
They're talking about a slowdown, not a full stop, and the data is not inconsistent with the long term trend.
Here you can see it in a graph: http://woodfortrees.org/plot/g...
The temperatures from the 10-20 years have not dipped below the long term trend line.
You're confusing local weather with global climate. They are not the same thing. Just because you had a cold winter where you are does not mean that everyone, everywhere else, had a cold winter.
Mr. Hu is not a ninja.
instead of making questionable measurements of the planet, why don't you figure out how to build a decent space vehicle? Which is your raison d'etre.
One of them. NASA was established by the National Aeronautics and Space Act of 1958. In the list of what NASA was established to do, the first item is:
(1) The expansion of human knowledge of phenomena in the atmosphere and space;
(building space vehicles was number 3 on the list)
http://www.geoffreylandis.com
Earth's weather is almost entirely determined by Solar activity (or lack of same in the Maunder Minimum)
The link between solar activity and weather is discussed in great detail in the IPCC Working Group 1 report, with voluminous references to the literature; have you read it? You can find it here: http://www.ipcc.ch/pdf/assessm... The analysis is chapter 2.7, Natural Forcings, section 2.7.1 "Solar Variability."
and large volcanic eruptions.
Another effect discussed in the same report: section 2.7.2 "Explosive Volcanic Activity"
The key point is that we measure the sun, and we record volcanic activity. There haven't been changes in the sun or in volcanic eruptions that are sufficient to account for the temperature trend.
Krakatoa is the last big eruption which caused a large drop in northern hemisphere temperatures as I recall.
The 1991 Mt. Pinatubo eruption was an important event, because its effects were well measured.
http://www.geoffreylandis.com
Why does the chart only go back to 1950?
Here's the Berkeley Earth graphic, with temperatures going back to 1870:
static.berkeleyearth.org/graphics/figure9.pdf
(also comparing models to measured data)
http://www.geoffreylandis.com
Departure of global temperature from average for 2014 (NOAA)
Earth's departure in temperature from the 20th century average during the period 1880 - 2014, according to NOAA.
global departure of temperature from average from 1965 - 2014 (scepticalscience.com)
Article: 2014: Hottest Year in Recorded Human History, Dr. Jeff Masters' blog entry at wunderground.com.
I hope I didn't brain my damage.