As we have seen, satellite data indicates that
land temperatures from ground has trend around twice the trend of land data from satellite data — and as almost twice the warming trend of SST, ocean data.
Look carefully at the following images (
all land temperatures from the recently established BEST dataset) and remember what I just said about the spatio - temporal aerosol distribution.
Familiar global datasets that we briefly consider include SSTs from HadSST2 (Rayner et al. 2006) and combined SST and
land temperatures from HadCRUT3v (Brohan et al. 2006).
First we see the difference between the surface
land temperatures from thermometers and the land and surface ocean temperature.
Summer is November through March with average
land temperature from 80 - 90 degrees and average water temperature 80 - 83 degrees.
Not exact matches
When traveling over colder water, and
land especially, the storm loses most of the energy that it gains
from the high
temperatures.
The average
temperature was 57.1 degrees F, up
from the old record, in 1998, which
landed an average of 54.3 degrees F. «We had our fourth warmest winter (2011/2012) on record, our warmest spring, a very hot summer with the hottest month on record for the nation (July 2012), and a warmer than average autumn,» Jake Crouch, a scientist at the National Climatic Data Center, told NBC News.
Our mushroom farms were in fact established on
land reclaimed
from a scrub forest zone never before subjected to cultivation with the major difference between day and night
temperature necessary for the strongest, healthiest, tastiest fungus.
Now, we pull pork
from the heat at 135 ° and let the
temperature rise to 145 ° as it rests,
landing it right in the sweet spot: perfectly pink and USDA approved.
The data also show a
land bump, or sill, at the mouth of Skinfaxe glacier, which prevents warmer, deep Atlantic water (yellow on
temperature bar)
from reaching the ice.
Authored by 77 scientists
from the Forest Service, other federal agencies and universities across the United States, the report outlines the way forests respond physiologically to drought - stress, as well as steps
land managers and foresters can take to mitigate the impacts of rising
temperatures and a lack of water.
They interpreted the deposits were formed on
land, not in the ocean, by identifying the presence of geyserite — a mineral deposit formed
from near boiling -
temperature, silica - rich, fluids that is only found in a terrestrial hot spring environment.
So using both
land - use and
temperature information
from satellites, Xiao and his team could track the spread of the flu by estimating where the birds would be.
Because monsoons result
from the
temperature differences between
land and sea, the yearly monsoon was so weakened that northern Africa and India experienced a devastating drought.
They range
from LANDSAT images of
land use in the Chesapeake Basin, to fish catches off California since the 1920s, to 400,000 years of global
temperature estimates
from antarctic ice cores.
The researchers analyzed
temperature records for the years 1881 to 2013
from HadCRUT4, a widely used data set for
land and sea locations compiled by the University of East Anglia and the U.K. Met Office.
To estimate the
temperature at various depths (
from 3,500 m to 9,500 m depth) the researchers have used the heat flow and
temperatures at 1,000 m and 2,000 m provided in the Atlas of Geothermal Resources in Europe, as well as thermal data of the
land surface available
from NASA.
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.
«These storms have a moderating effect on
land temperatures as they bring maritime air
from the oceans to the continents and a lack of them can thus favor extreme
temperatures.»
The project has already merged 1.6 billion
land surface
temperature measurements
from 16 sources, most of them publicly available, and is putting them in a simple format to allow easy use by scientists around the world.
Prior groups at NOAA, NASA, and in the UK (HadCRU) estimate about a 1.2 degree C
land temperature rise
from the early 1900s to the present.
Despite their importance, corals face a range of grave risks today,
from bleaching triggered by increasing seawater
temperatures, to sediment loads caused by terrestrial erosion
from land development, to predation by crown - of - thorns starfish.
This past November found Pokorny flying a small Cessna
from Lake Naivasha up the hills to the Mau Forest, where
land surface
temperatures in woodlands measured 19 degrees C; agricultural
land that until recently had been forest hovered close to 50 degrees C.
The argument is that the increased separation of the Antarctic
land mass
from South America led to the creation of the powerful Antarctic Circumpolar Current which acted as a kind of water barrier and effectively blocked the warmer, less salty waters
from the North Atlantic and Central Pacific
from moving southwards towards the Antarctic
land mass leading to the isolation of the Antarctic
land mass and lowered
temperatures which allowed the ice sheets to form.
The increase could be due to a combination of stronger winds spreading out the sea ice and fresh water
from melting ice on
land diluting seawater so it freezes at higher
temperatures.
The team concluded that the resulting drastic fluctuations in pH and ultraviolet radiation, combined with an overall
temperature increase
from greenhouse gas emissions, could have contributed to the end - Permian mass extinction on
land.
Dams; rising
temperatures and carbon dioxide concentrations; droughts; and increased runoff of nutrients
from urban and agricultural
lands are all compounding the problem.
The Berkeley researchers developed their own statistical methods so that they could use data
from virtually all of the
temperature stations on
land — some 39,000 in all — whereas the other research groups relied on subsets of data
from several thousand sites to build their records.
The apparent rise in evapotranspiration — the process by which water is transferred
from the
land to the atmosphere by evaporation
from plants and soil — is increasing potential drought risk with rising
temperature trends, especially during periodic drought cycles that have been linked with strong El Nino events.
The sneezing, watery eyes and runny noses
from seasonal allergies are poised to
land more people in the emergency room as
temperatures rise, researchers have found.
For their paper, published in Applied Geography, researchers at the Earth Institute at Columbia University and Battelle Memorial Institute studied air
temperature data
from weather stations,
land surface
temperatures measured by satellites and socioeconomic data.
Any reforms to come
from the process, starting next week, would affect about 62 percent of New York state's population, the proportion estimated to reside now in areas that could be hard hit as rising
land and ocean
temperatures raise average sea levels around the globe.
In addition to the surface data described above, measurements of
temperature above the surface have been made with weather balloons, with reasonable coverage over
land since 1958, and
from satellite data since 1979.
I used was the surface
temperature responses
from histAll --(histGHG + histNatural) to obtain the response to aerosols + ozone +
land - use and derive the enhancement of the response for that case relative to WMGHGs that I called E. Calculation of TCR based on histAll in a model is approximately the same as calculating the sum of responses to histGHG, histNat, and histInhomogeneous where the latter includes the factor E.
Global mean
temperatures averaged over
land and ocean surfaces,
from three different estimates, each of which has been independently adjusted for various homogeneity issues, are consistent within uncertainty estimates over the period 1901 to 2005 and show similar rates of increase in recent decades.
Figure 2: Global
land and ocean surface
temperature from GISS (red) and the Hadley Centre / Climatic Research Unit (blue) up to 2006.
The forcing over the last 150 years is around 1.6 W / m2 (including cooling effects
from aerosols and
land use change) but the climate is not (yet) in equilibirum, and so the full
temperature response has not been acheived.
Sea level rise has two primary components: the expansion in volume of seawater with increased
temperature and the addition of water in ocean basins
from the melting of
land - locked ice, including Antarctica and Greenland.
ASTER data is used to create detailed maps of
land surface
temperature, reflectance, and elevation.ASTER captures high spatial resolution data in 14 bands,
from the visible to the thermal infrared wavelengths, and provides stereo viewing capability for digital elevation model creation.
Temperature changes relative to the corresponding average for 1901 - 1950 (°C)
from decade to decade
from 1906 to 2005 over the Earth's continents, as well as the entire globe, global
land area and the global ocean (lower graphs).
They wrote that their comparisons of sea - level pressures, sea - surface
temperatures and
land - based air
temperatures provided «consistent evidence for strong» regulation of
temperatures by changes in ocean cycles «
from monthly to century time scales.»
It was cooler than average in eastern Russia, regions of central and northern Africa, and part of central South America, according to the December
Land & Ocean
Temperatures Departure
from Average and Percentiles maps above.
Temporal scaling of
temperature variability
from land to oceans.
So ocean
temperatures, unlike
temperatures on
land, are slow to fluctuate
from natural forces, such as El Niño / La Niña patterns or volcanic eruptions.
Similar to the March — May global
land and ocean surface
temperature, the March — May
land surface
temperature was also the fourth highest three - month departure
from average for any three - month period on record.
This was also the highest monthly global
land temperature departure
from average since April 2016.
Meanwhile, as oceans heat up, thermal expansion causes sea levels that are already rising
from the melting of
land ice (triggered by higher air and sea
temperatures) to rise even more.
The figure below, taken
from the 2007 IPCC report, shows model runs with only natural forcings; model runs with all forcings; and observations of surface
temperatures for the whole globe —
land areas and ocean areas.
The important point the study makes is that the onset of warming in the tropical ocean in the 1830s is earlier than is typically assumed
from the instrumental record and
from other proxy reconstructions that have focused mainly on Northern Hemisphere
land temperatures.
What we think of as the modern
temperature record is made up of many thousands of measurements
from the air above
land and the ocean surface, collected by ships, buoys and sometimes satellites, too.