Global Highlights:
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Contents of this Section: |
The data presented in this
report are preliminary. Ranks and anomalies may change as more
complete data are received and processed. The most current data may
be accessed via the Global Surface
Temperature Anomalies page.
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IntroductionTemperature anomalies for June 2007 are shown
on the dot maps below. The dot map, below left, provides a spatial
representation of anomalies calculated from the Global
Historical Climatology Network (GHCN) data set of land surface
stations using a 1961-1990 base period. The dot map, below right,
is a product of a merged land surface and sea surface temperature
anomaly analysis developed by Smith and Reynolds (2005).
Temperature anomalies with respect to the 1961-1990 mean for land
and ocean are analyzed separately and then merged to form the
global analysis. Additional information on this product is available.
Anomalously warm temperatures have covered
much of the globe throughout the year. The
January-June 2007 map of temperature anomalies shows the
presence of warmer than average temperatures across all land areas,
with the exception of Argentina. Warmer than average Sea Surface
Temperatures (SSTs) occured in the equatorial Pacific, Atlantic and
the Indian oceans. Cooler than average conditions were observed in
the northeastern Pacific and some areas in the southern
oceans.
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During June, there were above average
temperatures across Europe, eastern Brazil, northwestern Africa,
and most of Asia and the contiguous U.S. Cooler-than-average
conditions occurred in in Australia, Argentina, western Russia, and
the southcentral U.S. Warmer than average SSTs occurred in the
Atlantic Ocean, North Indian Ocean, and the western equatorial
Pacific Ocean. SST anomalies in the Niño 3.4
region were representative of a neutral ENSO phase. Please see
the latest ENSO
discussion for additional information.
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The mean position of upper level ridges of
high pressure and troughs of low pressure (depicted by positive and
negative 500-millibar height anomalies on the June map) are
generally reflected by areas of positive and negative temperature
anomalies at the surface, respectively. For other Global products
see the Climate Monitoring
Global Products page.
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Images of sea surface temperature conditions are available for all weeks during 2007 at the weekly SST page. |
Temperature Rankings and Graphics |
Effective with the February 2006 report, NCDC
transitioned from the use of the Operational Global Surface
Temperature Index (Quayle et al. 1999) to the
blended land and ocean dataset developed by Smith and Reynolds (2005).
The differences between the two methods are discussed in Smith et al. (2005).
June 2007 ranked as the fourth warmest June
since records began in 1880 for combined global land and ocean
surface temperatures. The June land surface temperature ranked
third warmest on record, while the ocean surface temperature ranked
eighth warmest in the 127-year record. For the January-June
year-to-date period, the global surface temperature ranked second
warmest, while the land ranked warmest on record.
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Current Month / Year-to-date |
June | Anomaly | Rank | Ties | Warmest (or Next Warmest) Year on Record |
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GlobalLandOcean Land and Ocean |
+0.84°C (+1.51°F) +0.44°C (+0.79°F) +0.55°C (+0.99°F) |
3rd warmest 8th warmest 4th warmest |
2005 (+0.98°C/1.76°F) 2005 (+0.53°C/0.95°F) 2005 (+0.65°C/1.17°F) |
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Northern HemisphereLandOcean Land and Ocean |
+0.93°C (+1.67°F) +0.47°C (+0.85°F) +0.64°C (+1.15°F) |
2nd warmest 7th warmest 3rd warmest |
2005 2002,1998 |
2006 (+1.08°C/1.94°F) 2005 (+0.62°C/1.12°F) 2005 (+0.74°C/1.33°F) |
Southern HemisphereLandOcean Land and Ocean |
+0.59°C (+1.06°F) +0.43°C (+0.77°F) +0.45°C (+0.81°F) |
12th warmest 8th warmest 8th warmest |
2005 (+1.10°C/1.98°F) 1998 (+0.51°C/0.92°F) 2005 (+0.55°C/0.99°F) |
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January-June | Anomaly | Rank | Ties | Warmest (or Next Warmest) Year on Record |
---|---|---|---|---|
GlobalLandOcean Land and Ocean |
+1.18°C (+2.12°F) +0.43°C (+0.77°F) +0.63°C (+1.13°F) |
warmest 6th warmest 2nd warmest |
2002 |
2002 (+1.08°C/1.94°F) 1998 (+0.53°C/0.95°F) 1998 (+0.64°C/1.15°F) |
Northern HemisphereLandOcean Land and Ocean |
+1.38°C (+2.48°F) +0.45°C (+0.81°F) +0.80°C (+1.44°F) |
warmest 4th warmest warmest |
2002 (+1.26°C/2.27°F) 2005 (+0.51°C/0.92°F) 2002 (+0.74°C/1.33°F) |
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Southern HemisphereLandOcean Land and Ocean |
+0.61°C (+1.10°F) +0.42°C (+0.76°F) +0.45°C (+0.81°F) |
4th warmest 8th warmest 5th warmest |
2005 (+0.92°C/1.66°F) 1998 (+0.56°C/1.01°F) 1998 (+0.60°C/1.08°F) |
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PrecipitationThe maps below represent anomaly values based
on the GHCN data set of land surface stations using a base period
of 1961-1990. During June 2007, above average precipitation fell
over areas that include the United Kingdom, southern India, eastern
Australia, southcentral U.S., and parts of eastern Asia. Drier than
average conditions were observed in southeastern Asia and parts of
South America and the eastern U.S. Additional details on flooding
and drought can also be found on the June Global Hazards
page.
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ENSO SST AnalysisClick here for animated loop |
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ReferencesChristy, John R., R.W. Spencer, and W.D. Braswell, 2000: MSU Tropospheric Temperatures: Dataset Construction and Radiosonde Comparisons. J. of Atmos. and Oceanic Technology 17 1153-1170.Free M., D.J. Seidel, J.K. Angell, J. Lanzante, I. Durre and T.C. Peterson (2005) Radiosonde Atmospheric Temperature Products for Assessing Climate (RATPAC): A new dataset of large-area anomaly time series, J. Geophys. Res., 10.1029/2005JD006169. Free, M., J.K. Angell, I. Durre, J. Lanzante, T.C. Peterson and D.J. Seidel(2004), Using first differences to reduce inhomogeneity in radiosonde temperature datasets, J. Climate, 21, 4171-4179. Fu, Q., C.M. Johanson, S.G. Warren, and D.J. Seidel, 2004: Contribution of stratospheric cooling to satellite-inferred tropospheric temperature trends. Nature, 429, 55-58. Lanzante, J.R., S.A. Klein, and D.J. Seidel (2003a), Temporal homogenization of monthly radiosonde temperature data. Part I: Methodology, J. Climate, 16, 224 240. Lanzante, J.R., S.A. Klein, and D.J. Seidel (2003b), Temporal homogenization of monthly radiosonde temperature data. Part II: Trends, sensitivities, and MSU comparison, J. Climate, 16, 241 262. Mears, Carl A., M.C. Schabel, F.J. Wentz, 2003: A Reanalysis of the MSU Channel 2 Tropospheric Temperature Record. J. Clim 16, 3650-3664. Peterson, T.C. and R.S. Vose, 1997: An Overview of the Global Historical Climatology Network Database. Bull. Amer. Meteorol. Soc., 78, 2837-2849. Quayle, R. G., T. C. Peterson, A. N. Basist, and C. S. Godfrey, 1999: An operational near-real-time global temperature index. Geophys. Res. Lett., 26, 333-335. Smith, T. M., and R. W. Reynolds (2005), A global merged land air and sea surface temperature reconstruction based on historical observations (1880-1997), J. Clim., 18, 2021-2036. |