(Click NOAA satellite image for larger view of
sea surface temperature anomalies as of Aug. 7, 2006.
A statistical forecast based on canonical correlation analysis with fall
sea surface temperature anomalies as the main predictor was submitted by Tivy (Figure 3).
Not exact matches
«You can find
sea surface temperature anomalies online, you can look at the signs of the Pacific decadal oscillations and El Niño
as well — the data aren't behind some sort of paywall, anyone can Google it,» she said.
During El Nino events the ocean circulation changes in such a way
as to cause a large and temporary positive
sea surface temperature anomaly in the tropical Pacific.
(The specific dataset used
as the foundation of the composition was the Combined Land -
Surface Air and
Sea -
Surface Water
Temperature Anomalies Zonal annual means.)
Canadian Ice Service, 4.7, Multiple Methods
As with CIS contributions in June 2009, 2010, and 2011, the 2012 forecast was derived using a combination of three methods: 1) a qualitative heuristic method based on observed end - of - winter arctic ice thicknesses and extents, as well as an examination of Surface Air Temperature (SAT), Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model, which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predictor
As with CIS contributions in June 2009, 2010, and 2011, the 2012 forecast was derived using a combination of three methods: 1) a qualitative heuristic method based on observed end - of - winter arctic ice thicknesses and extents,
as well as an examination of Surface Air Temperature (SAT), Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model, which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predictor
as well
as an examination of Surface Air Temperature (SAT), Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model, which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predictor
as an examination of
Surface Air
Temperature (SAT),
Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model, which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predicto
Sea Level Pressure (SLP) and vector wind
anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model, which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and
sea ice predicto
sea ice predictors.
Since 1850, CO2 levels rose,
as did the «globally and annually averaged land and
sea surface temperature anomaly» (for what it's worth), but nobody knows whether or not the increase in CO2 had anything whatsoever to do with the warming.
Canadian Ice Service, 4.7 (+ / - 0.2), Heuristic / Statistical (same
as June) The 2015 forecast was derived by considering a combination of methods: 1) a qualitative heuristic method based on observed end - of - winter Arctic ice thickness extents,
as well
as winter
Surface Air
Temperature,
Sea Level Pressure and vector wind anomaly patterns and trends; 2) a simple statistical method, Optimal Filtering Based Model (OFBM), that uses an optimal linear data filter to extrapolate the September sea ice extent timeseries into the future and 3) a Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predicto
Sea Level Pressure and vector wind
anomaly patterns and trends; 2) a simple statistical method, Optimal Filtering Based Model (OFBM), that uses an optimal linear data filter to extrapolate the September
sea ice extent timeseries into the future and 3) a Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predicto
sea ice extent timeseries into the future and 3) a Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and
sea ice predicto
sea ice predictors.
A statistical forecast using a regression based approach with fall
sea surface temperature anomalies in the North Atlantic
as the main predictor was submitted by Tivy (Figure 3) for ice concentration
anomalies in July in Hudson Bay.
Third, note how the
sea surface temperature anomalies in the Western Pacific (and East Indian Ocean) continue to rise
as the La Niña event strengthens.
The NINO3.4 index is defined
as the average of
sea surface temperature (SST)
anomalies over the region 5 ° N - 5 ° S and 170 ° -120 ° W. El Niño (a warm event) is considered to occur when the NINO3.4 index persistently exceeds +0.8 °C.
This was defined
as the date when the «globally and annually averaged land and
sea surface temperature anomaly» (HadCRUT3 at the time) would exceed that of 1990 by 0.5 ºC.
Burgmann et al (2008) discuss this in terms of a Pacific Decadal Variation (PDV)-- and describe the
sea surface temperature signature
as «characterized by a broad triangular pattern in the tropical Pacific surrounded by opposite
anomalies in the midlatitudes of the central and western Pacific Basin.»
You are spending a lot of time rationalizing WHY there was a «standstill» in global warming (
as measured by the «globally and annually averaged land and
sea surface temperature anomaly»).
Some processes arise through interactions with other parts of the climate system such
as the ocean (for example
as manifested through
sea surface temperature anomalies),
sea ice
anomalies, snow cover
anomalies as well
as through coupling to the circulation in the stratosphere.
Type 3 downscaling is applied, for example, for seasonal forecasts where slowly changing
anomalies in the
surface forcing (such
as sea surface temperature) provide real - world information to constrain the downscaling results.
The metric used by IPCC in all its reports for past and projected future «global warming» has been the «globally and annually averaged land and
sea surface temperature anomaly» (
as reported by HadCRUT3).
Guest post by Bob Tisdale This post will serve
as the Preliminary
Sea Surface Temperature Anomaly Update for June 2012, since we'll be using preliminary June 2012 data in it.
Canadian Ice Service; 5.0; Statistical
As with Canadian Ice Service (CIS) contributions in June 2009 and June 2010, the 2011 forecast was derived using a combination of three methods: 1) a qualitative heuristic method based on observed end - of - winter Arctic Multi-Year Ice (MYI) extents, as well as an examination of Surface Air Temperature (SAT), Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere, and sea ice predictor
As with Canadian Ice Service (CIS) contributions in June 2009 and June 2010, the 2011 forecast was derived using a combination of three methods: 1) a qualitative heuristic method based on observed end - of - winter Arctic Multi-Year Ice (MYI) extents,
as well as an examination of Surface Air Temperature (SAT), Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere, and sea ice predictor
as well
as an examination of Surface Air Temperature (SAT), Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere, and sea ice predictor
as an examination of
Surface Air
Temperature (SAT),
Sea Level Pressure (SLP) and vector wind anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere, and sea ice predicto
Sea Level Pressure (SLP) and vector wind
anomaly patterns and trends; 2) an experimental Optimal Filtering Based (OFB) Model which uses an optimal linear data filter to extrapolate NSIDC's September Arctic Ice Extent time series into the future; and 3) an experimental Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere, and
sea ice predicto
sea ice predictors.
They write in their abstract: «The Pacific decadal oscillation (PDO), defined
as the leading empirical orthogonal function of North Pacific
sea surface temperature anomalies, is a widely used index for decadal variability.
''... worked with two sediment cores they extracted from the seabed of the eastern Norwegian
Sea, developing a 1000 - year proxy
temperature record «based on measurements of δ18O in Neogloboquadrina pachyderma, a planktonic foraminifer that calcifies at relatively shallow depths within the Atlantic waters of the eastern Norwegian
Sea during late summer,» which they compared with the temporal histories of various proxies of concomitant solar activity... This work revealed,
as the seven scientists describe it, that «the lowest isotope values (highest
temperatures) of the last millennium are seen ~ 1100 - 1300 A.D., during the Medieval Climate
Anomaly, and again after ~ 1950 A.D.» In between these two warm intervals, of course, were the colder
temperatures of the Little Ice Age, when oscillatory thermal minima occurred at the times of the Dalton, Maunder, Sporer and Wolf solar minima, such that the δ18O proxy record of near -
surface water
temperature was found to be «robustly and near - synchronously correlated with various proxies of solar variability spanning the last millennium,» with decade - to century - scale
temperature variability of 1 to 2 °C magnitude.»
Using a statistical model based on canonical correlation analysis with fall
sea surface temperature anomalies in the North Atlantic
as the main predictor, Tivy shows below - normal ice concentrations throughout most of the region (Figure 12), which suggests an earlier - than - normal opening of the shipping season.
But if
as Kevin Trenberth argues that for every «1 degree Celsius
sea surface temperature anomalies gives 10 to 15 percent increase in rainfall», then the science is correct about AGW and the sceptics are just raving on.
Any discussion on that webpage you linked... https://www.ncdc.noaa.gov/monitoring-references/faq/
anomalies.php... regarding their preference for
anomalies has to do with land
surface, not
sea surface,
temperatures, which is why their land
surface temperature data and consequently their combined land + ocean data are presented
as anomalies.
Sea surface temperature anomalies have practical
as well
as scientific applications.
Sea surface temperature anomalies that persist over many years can be signals of regional or global climate change, such
as global warming.
Strong, localized
sea surface temperature anomalies may reveal that an ocean current, such
as the Gulf Stream Current off the east coast of the United States, has veered off its usual path for a time or is stronger or weaker than usual.
Over ocean stretches with a positive SST
anomaly air convection is higher (
as the
temperature difference between the warm
sea surface and the cool air higher up in the troposphere is greater), so a higher likelihood for the formation of depressions exists and more precipitation is to be expected.
Canadian Ice Service, 4.7 (± 0.2), Heuristic / Statistical (same
as June) The 2015 forecast was derived by considering a combination of methods: 1) a qualitative heuristic method based on observed end - of - winter Arctic ice thickness extents,
as well
as winter
Surface Air
Temperature,
Sea Level Pressure and vector wind anomaly patterns and trends; 2) a simple statistical method, Optimal Filtering Based Model (OFBM), that uses an optimal linear data filter to extrapolate the September sea ice extent timeseries into the future and 3) a Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predicto
Sea Level Pressure and vector wind
anomaly patterns and trends; 2) a simple statistical method, Optimal Filtering Based Model (OFBM), that uses an optimal linear data filter to extrapolate the September
sea ice extent timeseries into the future and 3) a Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and sea ice predicto
sea ice extent timeseries into the future and 3) a Multiple Linear Regression (MLR) prediction system that tests ocean, atmosphere and
sea ice predicto
sea ice predictors.
The best way to envision the relation between ENSO and precipitation over East Africa is to regard the Indian Ocean
as a mirror of the Pacific Ocean
sea surface temperature anomalies [much like the Western Hemisphere Warm Pool creates such a SST mirror with the Atlantic Ocean too]: during a La Niña episode, waters in the eastern Pacific are relatively cool
as strong trade winds blow the tropically Sun - warmed waters far towards the west.
As can be seen from the curve below, the HadCRUT3 «globally and annually averaged land and
sea surface temperature anomaly» shows slight (if statistically insignificant) cooling over the past 15 years (180 months).
As a result of the leftover warm water, the
sea surface temperature anomalies of the Rest - of - the - World appear to shift upwards in response to the strong El Niño events:
First of all: An ENSO index such
as NINO3.4
sea surface temperature anomalies are in fact a measure of the
sea surface temperature of the NINO3.4 region.
Sorry I don't have graphs of
surface air
temperatures or TLT for the tropical Pacific, but to help show this using
sea surface temperatures, not
anomalies, the following graph captures the
sea surface temperature gradients across the equatorial Pacific one year before the peak of the 1997/98 El Niño, at its peak, and at the peak of the trailing first La Niña season: And
as sea surface temperature anomalies:
2) The satellite tropospheric and
sea surface (SST) data differ from the HADCRUT
surface temp
anomaly, with the present
temperatures of both right at the same level
as in 1991 (while Fig. 1 here shows an increase over 1991 of about 0.25 °C).
But the «mean» of kriged, adjusted
anomalies of a small portion of the
surface air (and rarely
sea surface) of the globe are referred to in all the scare propaganda
as «Global Average
Temperature.»
However, for changes over time, only
anomalies,
as departures from a climatology, are used, most commonly based on the area - weighted global average of the
sea surface temperature anomaly and land
surface air
temperature anomaly.
For example I would encourage people to take a look at current
sea surface temperature anomalies for Hudson Bay
as an example.
The
anomaly map on the left is a product of a merged land
surface temperature (Global Historical Climatology Network, GHCN) and
sea surface temperature (ERSST.v4)
anomaly analysis
as described in Huang et al. (2016).
The possibility of the availability of the Argo data in near real time and displayed in the same format
as the
sea surface temperature anomalies (see) will be a very major contribution to climate science.