Not exact matches
Land - use changes
over the past 250 years in Europe have been huge, yet, they only caused a relatively small
temperature increase, equal to roughly 6 % of the
warming produced by global fossil fuel burning, Naudts noted.
While Earth's landmass has
warmed by about 1 degree Celsius (about 2 degrees Fahrenheit)
over the past century, on average,
land temperatures in the Arctic have risen almost 2 C (3.6 F).
Terrestrial ecosystems have encountered substantial
warming over the past century, with
temperatures increasing about twice as rapidly
over land as
over the oceans.
Warmer than average
temperatures were evident
over most of the global
land surface, except for parts of western Europe, northern Siberia, parts of eastern Asia and much of central Australia stretching north.
Pielke, who said one issue ignored in the paper is that
land surface
temperature measurements
over time show bigger
warming trends than measurements from higher up in a part of the atmosphere called the lower troposphere, and that still needs more explanation.
Warmer than average
temperatures were evident
over most of the global
land surfaces, except for parts of the United States and western Europe, northern Siberia, parts of eastern Asia and much of central Australia stretching north.
However, for the globe as a whole, surface air
temperatures over land have risen at about double the ocean rate after 1979 (more than 0.27 °C per decade vs. 0.13 °C per decade), with the greatest
warming during winter (December to February) and spring (March to May) in the Northern Hemisphere.
The observed fact that
temperatures increases slower
over the oceans than
over land demonstrates that the large heat capacity of the ocean tries to hold back the
warming of the air
over the ocean and produces a delay at the surface but nevertheless the atmosphere responds quit rapidly to increasing greenhouse gases.
The Nature article comes as climate scientists published what they said today was the «best ever» collection of evidence for global
warming, including
temperature over land, at sea and in the higher atmosphere, along with records of humidity, sea - level rise, and melting ice.
Warming has occurred in both
land and ocean domains, and in both sea surface
temperature (SST) and nighttime marine air
temperature over the oceans.
The former is likely to overestimate the true global surface air
temperature trend (since the oceans do not
warm as fast as the
land), while the latter may underestimate the true trend, since the air
temperature over the ocean is predicted to rise at a slightly higher rate than the ocean
temperature.
The climate in most places has undergone minor changes
over the past 200 years, and the
land - based surface
temperature record of the past 100 years exhibits
warming trends in many places.
«We show that at the present - day
warming of 0.85 °C about 18 % of the moderate daily precipitation extremes
over land are attributable to the observed
temperature increase since pre-industrial times, which in turn primarily results from human influence,» the research team said.
The «bounce» seen in November 2010 was driven by record -
warm temperature anomalies in the Northern Hemisphere, particularly
over land.
Here we show that, globally,
temperatures over land have risen as much on windy nights as on calm nights, indicating that the observed overall
warming is not a consequence of urban development.
The former is likely to overestimate the true global surface air
temperature trend (since the oceans do not
warm as fast as the
land), while the latter may underestimate the true trend, since the air
temperature over the ocean is predicted to rise at a slightly higher rate than the ocean
temperature.
Seems to me the debate about AGHG global
warming and increasing TC frequency / intensity / duration boils down to the fact that as sea surface
temperatures, as well as deeper water
temperatures rise, the wallop of any TC
over warmer seas without mitigating circumstances like wind sheer and dry air off
land masses entrained in the cyclone will likely be much more devastating.
«One of the most significant signals in the thermometer - observed
temperature record since 1900 is the decrease in the diurnal
temperature range
over land, largely due to
warming of the minimum
temperatures... Climate models have in general not replicated the change in diurnal
temperature range well.
Surface
temperatures over land haven't gone up much, but that's not the only or even the best way to measure the amount of
warming.
So the infilled GISS data, which extends out
over the Arctic, would show the greater
warming since the 1970s... until the
warming stops for Northern Hemisphere sea surface
temperatures and for the low - to - mid latitude
land surface air
temperatures.
«Global surface
temperature trends, based on
land and marine data, show
warming of about 0.8 deg C
over the last 100 years.
«annual
temperatures up to AD 2000
over extra-tropical NH
land areas have probably exceeded by about 0.3 °C the
warmest previous interval
over the past 1162 years»
Surface
temperatures over land regions have
warmed at a faster rate than
over the oceans in both hemispheres.
And air
temperatures over exposed
land surfaces should
warm differently than air
temperatures over sea ice, especially when open ocean separates them.
By comparing modelled and observed changes in such indices, which include the global mean surface
temperature, the
land - ocean
temperature contrast, the
temperature contrast between the NH and SH, the mean magnitude of the annual cycle in
temperature over land and the mean meridional
temperature gradient in the NH mid-latitudes, Braganza et al. (2004) estimate that anthropogenic forcing accounts for almost all of the
warming observed between 1946 and 1995 whereas
warming between 1896 and 1945 is explained by a combination of anthropogenic and natural forcing and internal variability.
This
warming can be seen in measurements of troposphere
temperatures measured by weather balloons and satellites, in measurements of ocean heat content, sea surface
temperature (measured in situ and by satellites), air
temperatures over the ocean, air
temperature over land.
The annual anomaly of the global average surface
temperature in 2014 (i.e. the average of the near - surface air
temperature over land and the SST) was +0.27 °C above the 1981 - 2010 average (+0.63 °C above the 20th century average), and was the
warmest since 1891.
in
warming over the last decades (see
land surface
temperature chart below).
They avoid some of the issues in Millar by using more globally - representative surface
temperature records, though they still use series that blend surface air
temperatures over land with slower -
warming sea surface
temperatures over the ocean.
95 % confidence that 50 % of the
warming since 1951 is due to some form of human activity is not likely to be falsified using «Global» surface
temperature since about 30 % of the
warming is
over land and GISS interprets high latitude and higher altitude
warming as «surface»
warming.
While consistent with the IPCC assessments of historical
warming, it lacks coverage of much of the fast -
warming Arctic region and blends surface air
temperatures over land with slower -
warming sea surface
temperatures over the ocean.
-- Increased urbanization and
land use changes since WWII as a possible partial cause of
warming of global surface
temperature over land.
Predictably we see more
warming over land than water and more when
temperature is freezing than not freezing.
Since you are a frequent visitor to WUWT, you are well aware that I have illustrated, explained, and animated cause (ENSO) and effect (the
warming of sea surface
temperatures, ocean heat content, lower troposphere
temperatures, and
land + sea surface
temperatures) in dozens of blog posts
over the past 3 1/2 years.
Average air
temperature over the
land and sea surface was 0.56 degrees Celsius above the long - term average, tied with 2010 as the joint
warmest year on record.
The climate in most places has undergone minor changes
over the past 200 years, and the
land - based surface
temperature record of the past 100 years exhibits
warming trends in many places.
On my religion: I am honest when I say to you that there seem to be no
warming in areas
over land in areas where ocean air do not dominate
temperature trends, then its true.
According to Klotzbach et al. (2010), which the Watts paper references, there should be an amplification factor of ~ 1.1 between surface and lower troposphere
temperatures over land (greater atmospheric
warming having to do with water vapor amplification).
They say that world would actually
warm up by just 1.64 °C overall, and the vegetation - cooling effect would be stronger
over land to boot — thus
temperatures on
land would would be a further 0.3 °C cooler compared to the present sims.»
Many more flawed or misleading presentations of Global
Warming science exist in the book, including those on Arctic sea ice thinning, correction of land - based temperature measurements for the urban heat island effect, satellite vs. ground - based measurements of Earth's warming, and controversies over sea level rise est
Warming science exist in the book, including those on Arctic sea ice thinning, correction of
land - based
temperature measurements for the urban heat island effect, satellite vs. ground - based measurements of Earth's
warming, and controversies over sea level rise est
warming, and controversies
over sea level rise estimates.
The «unnatural»
warming so far seen is however trended strongly to the alterations to the planetary surface by Humanity
over the past 400 years and the rebalance towards greater kinetic induction (in its cumulative effect) is now producing observable alterations not only to the
Land Surface median
Temperature, but to the Ocean (vie conduction / convection) and a still unconfirmed claim of a small overall rise in Median Atmospheric
Temperature, which if «true» would place the Planetary Biosphere on the «Human Population Plot» with regard to «
warming».
The period of increased
warming from 1987 to 1997 loosely coincided with the divergence of the global average
temperature anomalies
over land, which are derived from observation station recordings, and the global average anomalies in sea surface
temperatures.
The question at which Parker's study was addressed was the question: «Could the global
warming apparent in the record of
land - based
temperatures be due to an increase
over time in the local UHI effects?»
This is close to the
warming of 1.09 °C (0.86 — 1.31 °C) observed in global mean
land temperatures over the period 1951 — 2010, which, in contrast to China's recorded
temperature change, is only weakly affected by urban
warming influences.
I want to point out that all of the surface data sets
over land suffer from i) a systematic
warm bias associated with using minimum
temperatures in the construction of trends and I) in blending non-spatially representative sites with good sites.
Could a giant underground eruption put enough heat into the ocean that
over a hundred years
temperatures became
warmer in the ocean and subsequently in the air and
land?
In 2010,
temperatures measured
over land alone were also the
warmest ever, with instruments showing a December - November average of 14.85 ˚C.
Finds that average daytime surface
temperature in the Jambi province increased by 1.05 °C
over the last 16 years, which followed the trend of observed
land cover changes and exceeded the effects of climate
warming
(11/15/07) «Ban the Bulb: Worldwide Shift from Incandescents to Compact Fluorescents Could Close 270 Coal - Fired Power Plants» (5/9/07) «Massive Diversion of U.S. Grain to Fuel Cars is Raising World Food Prices» (3/21/07) «Distillery Demand for Grain to Fuel Cars Vastly Understated: World May Be Facing Highest Grain Prices in History» (1/4/07) «Santa Claus is Chinese OR Why China is Rising and the United States is Declining» (12/14/06) «Exploding U.S. Grain Demand for Automotive Fuel Threatens World Food Security and Political Stability» (11/3/06) «The Earth is Shrinking: Advancing Deserts and Rising Seas Squeezing Civilization» (11/15/06) «U.S. Population Reaches 300 Million, Heading for 400 Million: No Cause for Celebration» (10/4/06) «Supermarkets and Service Stations Now Competing for Grain» (7/13/06) «Let's Raise Gas Taxes and Lower Income Taxes» (5/12/06) «Wind Energy Demand Booming: Cost Dropping Below Conventional Sources Marks Key Milestone in U.S. Shift to Renewable Energy» (3/22/06) «Learning From China: Why the Western Economic Model Will not Work for the World» (3/9/05) «China Replacing the United States and World's Leading Consumer» (2/16/05)» Foreign Policy Damaging U.S. Economy» (10/27/04) «A Short Path to Oil Independence» (10/13/04) «World Food Security Deteriorating: Food Crunch In 2005 Now Likely» (05/05/04) «World Food Prices Rising: Decades of Environmental Neglect Shrinking Harvests in Key Countries» (04/28/04) «Saudis Have U.S.
Over a Barrel: Shifting Terms of Trade Between Grain and Oil» (4/14/04) «Europe Leading World Into Age of Wind Energy» (4/8/04) «China's Shrinking Grain Harvest: How Its Growing Grain Imports Will Affect World Food Prices» (3/10/04) «U.S. Leading World Away From Cigarettes» (2/18/04) «Troubling New Flows of Environmental Refugees» (1/28/04) «Wakeup Call on the Food Front» (12/16/03) «Coal: U.S. Promotes While Canada and Europe Move Beyond» (12/3/03) «World Facing Fourth Consecutive Grain Harvest Shortfall» (9/17/03) «Record
Temperatures Shrinking World Grain Harvest» (8/27/03) «China Losing War with Advancing Deserts» (8/4/03) «Wind Power Set to Become World's Leading Energy Source» (6/25/03) «World Creating Food Bubble Economy Based on Unsustainable Use of Water» (3/13/03) «Global
Temperature Near Record for 2002: Takes Toll in Deadly Heat Waves, Withered Harvests, & Melting Ice» (12/11/02) «Rising
Temperatures & Falling Water Tables Raising Food Prices» (8/21/02) «Water Deficits Growing in Many Countries» (8/6/02) «World Turning to Bicycle for Mobility and Exercise» (7/17/02) «New York: Garbage Capital of the World» (4/17/02) «Earth's Ice Melting Faster Than Projected» (3/12/02) «World's Rangelands Deteriorating Under Mounting Pressure» (2/5/02) «World Wind Generating Capacity Jumps 31 Percent in 2001» (1/8/02) «This Year May be Second
Warmest on Record» (12/18/01) «World Grain Harvest Falling Short by 54 Million Tons: Water Shortages Contributing to Shortfall» (11/21/01) «Rising Sea Level Forcing Evacuation of Island Country» (11/15/01) «Worsening Water Shortages Threaten China's Food Security» (10/4/01) «Wind Power: The Missing Link in the Bush Energy Plan» (5/31/01) «Dust Bowl Threatening China's Future» (5/23/01) «Paving the Planet: Cars and Crops Competing for
Land» (2/14/01) «Obesity Epidemic Threatens Health in Exercise - Deprived Societies» (12/19/00) «HIV Epidemic Restructuring Africa's Population» (10/31/00) «Fish Farming May Overtake Cattle Ranching As a Food Source» (10/3/00) «OPEC Has World
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If this is the best such
land area surface
temperature assessment system on the planet (covering, as well, a broad range of metropolitan, suburban, and rural areas), and the quality of the system is now proven to be demonstrably more prone to error than had been previously assumed — with the preponderance of error shown to produce the impression of
warming in excess of real conditions prevailing — what may be reliably inferred about surface
temperature monitoring systems data from even less reliable thermometers all
over the rest of the world?