Abstract We study trends and temporal correlations
in the monthly mean temperature data of Prague and Melbourne derived from four state - of - the - art general circulation models that are currently used in studies of anthropogenic effects on the atmosphere: GFDL - R15 - a, CSIRO - Mk2, ECHAM4 / OPYC3 and HADCM3.
The warm anomalies in June lasted throughout the entire month (increases
in monthly mean temperature of up to 6 to 7 °C), but July was only slightly warmer than on average (+1 to +3 °C), and the highest anomalies were reached between 1st and 13th August (+7 °C)(Fink et al., 2004).
There is a difference
in monthly mean temperature of 10 °C between the cities of Los Angeles and San Diego.
Not exact matches
Normalised RMS error
in simulation of climatological patterns of
monthly precipitation,
mean sea level pressure and surface air
temperature.
This figure from the McLean et al (2009) research shows that
mean monthly global
temperature (MSU GTTA) corresponds
in general terms with the Southern Oscillation Index (SOI) of seven months earlier.
Glacier response, at least
in part, is due to changes
in the freezing level - the elevation where
mean monthly temperatures are 0 degrees Celsius (32 degrees Fahrenheit).
The
mean monthly minimum
temperature in winter is 61F and 75F
in summer, with maximums of 82F
in winter and 91F
in summer.
The
mean monthly minimum
temperature in winter is 61C and 75C
in summer, with maximums of 82C
in winter and 91C
in summer.
The warming trends
in looking at numerous 100 year
temperature plots from northern and high elevation climate stations... i.e. warming trends
in annual
mean and minimum
temperature averages, winter
monthly means and minimums and especially winter minimum
temperatures and dewpoints... indicate climate warming that is being driven by the accumulation of greenhouse gases
in the atmosphere — no visible effects from other things like changes
in solar radiation or the levels of cosmic rays.
This can be done a number of ways, firstly, plotting the observational data and the models used by IPCC with a common baseline of 1980 - 1999
temperatures (as done
in the 2007 report)(Note that the model output is for the annual
mean,
monthly variance would be larger):
The figure to the left shows the spatial
mean temperature over all grid boxes
in the HadCRUT3 data set that have continuous
monthly coverage over the 1901 - 2008 period.
The warmth was most dramatic
in September, which saw a
mean temperature anomaly of +2.75 C, setting a new
monthly record by more than a degree.
Further analysis showed that the absolute
monthly maximum / minimum
temperature was poorly correlated with that of the previous month, ruling out depeendency
in time (this is also true for
monthly mean temperature — hence, «seasonal forecasting» is very difficult
in this region).
The results for such a test on
monthly absolute minimum / maximum
temperatures in the Nordic countries and
monthly mean temperatures worldwide are inconsistent with what we would see under a stable climate.
About taking differences (current period figures less prior period figures) of anomalies: the anomalies are the value less the
monthly mean (i.e., the
mean for the particular month over the years,
in this case 32 full years), as is the usual practice with climate data (most notably
temperature).
These data show that there has been no change
in the
mean monthly temperature for solstice months at this site for a century.
An analysis I published
in 2004, looking at how often record - high
monthly temperatures recur, indicated that record - breaking
monthly mean temperature have been more frequent that they would have been if the climate were not getting hotter.
Scientists
in Canada have recorded
temperatures for the 71 - year peiod from 1936 to 2006, and have seen that
mean monthly temperatures have increased enough to provide what they call a «substantial warming signal.»
While the changes
in both the
mean and higher order statistical moments (e.g., variance) of time - series of climate variables affect the frequency of relatively simple extremes (e.g., extreme high daily or
monthly temperatures, damaging winds), changes
in the frequency of more complex extremes are based on changes
in the occurrence of complex atmospheric phenomena (e.g., hurricanes, tornadoes, ice storms).
Normalised RMS error
in simulation of climatological patterns of
monthly precipitation,
mean sea level pressure and surface air
temperature.
(c) The global
mean (80 ° N to 80 ° S) radiative signature of upper - tropospheric moistening is given by
monthly time series of combinations of satellite brightness
temperature anomalies (°C), relative to the period 1982 to 2004, with the dashed line showing the linear trend of the key brightness
temperature in °C per decade.
During the drought years of 2012 — 2015,
mean monthly water
temperatures in the freshwater regions of the Delta from April to July were on average higher than between 1995 and 2011 (two - factor ANOVA, Bonferroni corrected P < 0.01), demonstrating the effects of drought on surface water
temperatures (Fig. 1B).
In reconstructing the changes in global mean temperature since 1850, Berkeley Earth has examined 16 million monthly average temperature observations from 43,000 weather station
In reconstructing the changes
in global mean temperature since 1850, Berkeley Earth has examined 16 million monthly average temperature observations from 43,000 weather station
in global
mean temperature since 1850, Berkeley Earth has examined 16 million
monthly average
temperature observations from 43,000 weather stations.
A comparison of the long term and short term
mean for
monthly precipitation and
temperature from the eight NOAA State of Washington Division 5 Weather Stations (Cascade Mountains) illustrates three important climate changes
in the North Cascades for the 1984 - 1994 period.
Offshore,
mean monthly sea surface
temperatures range from 15.4 °C to 20.1 °C [3], but
in the nearshore upwelling region, variability is greater and
temperatures range from 10 °C to 18 °C [4].
When scientists
in the 1960s - 70s compiled data to build their global average
temperature series they used state averages of
monthly mean temperatures from weather stations around the world.
High values of the Hurst exponent of H = 0.66 ± 0.05 for deseasonalized
monthly mean surface
temperatures in the sample period 1850 - 2015 suggest persistence and long term memory
in the
temperature time series.
I have mapped the February 2014
mean temperature anomalies
in the Environment Canada
monthly summaries that have «normals».
An appreciable number of nonurban stations
in the United States and Canada have been identified with statistically significant (at the 90 % level) decreasing trends
in the
monthly mean diurnal
temperature range between 1941 - 80.
Our study suggests that these patterns may also exist
in deseasonalized
monthly means of the measured
temperature record
in the post industrial era, a period that is normally associated with global warming and climate change.
Instead of changes
in monthly values of Temp and precip (and cloud cover) changes
in ANNUAL
mean temperature were used to force LPJ.
For the 1895 - 2009 period, the poor quality stations showed a greater warming trend
in the
mean monthly temperatures than the good quality stations, while for the 1970 - 2009 period, the reverse applied.
In regards the gridded network» stations, I have been informed that the Climate Research Unit's (CRU) monthly mean surface temperature dataset has been constructed principally from data available on the two websites identified in my letter of 12 March 200
In regards the gridded network» stations, I have been informed that the Climate Research Unit's (CRU)
monthly mean surface
temperature dataset has been constructed principally from data available on the two websites identified
in my letter of 12 March 200
in my letter of 12 March 2007.
We calculated three metrics of thermal history: (1) the
mean of the annual maximum DHW from 1985 — 2003 (2) the proportion of years from 1985 to 2003
in which the maximum DHW exceeded 4 °C · week, and (3) a year - to - year
temperature variability metric from [16], [46], which is the standard deviation of the maximum
monthly SST from 1985 — 2000 scaled such that the
mean for the world's coral reefs is 1 °C.
Obtain high - resolution climatologies of maximum, minimum, and
mean temperature and precipitation
in British Columbia, on a
monthly and annual basis at 30 arc second (~ 1 km) resolution (developed using PRISM).
In particular, the characterization of the urban
temperature trend was investigated using a seasonal unit root analysis of
monthly mean air
temperature data over the period of January 1970 to December 2013.
Monthly deaths
in the Castile - Leon region of Spain attributable to cardiovascular disease vs.
mean daily air
temperature.
Here, summer
temperatures struggle to get above − 20 °C and
monthly means fall below − 60 °C
in winter.
The UAH team pioneered the approach
in 1979, combining
temperature measurements from multiple satellites to produce an estimate for
monthly global
mean temperatures.
Longyearbyen on the Norwegian island of Spitsbergen, one of the northernmost towns
in the world, repeatedly experienced
monthly mean temperatures more than 6 °C above the 1981 — 2010 average.
This is physically unrealistic
in terms of the length - scale of
monthly temperatures (see Question 12), with the 1961 — 1990
mean difference between these sites being just 0.3 °C.
It's common knowledge among experienced professionals that, outside the English - speaking world, other countries use a great variety of methods
in determining the «
mean monthly temperature,» which is the customary datum used
in climatological work.
[2] LUR [longwave upward radiation] is negative
in the radiation budget and is calculated using the Stefan - Boltzmann law and
monthly mean temperature values measured at the individual radiation stations.
Using
monthly means as a proxy for heatwaves Coumou et al. (2013) and Hansen et al. (2012) indicate that record - breaking
temperatures in recent decades substantially exceed what would be expected by chance but caution is required when making inferences between these studies and those that deal with multi-day events and / or use more complex definitions for heatwave events
205, Edward Greisch: «An analysis I published
in 2004, looking at how often record - high
monthly temperatures recur, indicated that record - breaking
monthly mean temperature have been more frequent that they would have been if the climate were not getting hotter.»
Professor Benestad, R. E.: «An analysis I published
in 2004, looking at how often record - high
monthly temperatures recur, indicated that record - breaking
monthly mean temperature have been more frequent that they would have been if the climate were not getting hotter.»
It shows the range of variation
in US
monthly averages, with the orange being the
monthly average daily maximum
temperature across the US, the dark blue showing the
monthly average daily minimum
temperature, and the green the
monthly mean.
Has there ever been a caveat about the lack of any physical
meaning in local
monthly, or globally, averaged
temperatures?
October 2015 marks the sixth month
in a row that the global
monthly mean temperature has been broken.
Detailed station - level information on
monthly mean temperatures and trends for unadjusted and adjusted station data is provided
in graphical form: ftp://ftp.ncdc.noaa.gov/pub/data/ghcn/v3/products/stnplots/