Regarding crop yield declines for rice, previously research on rice grown in Asia has shown that for every 1 °C increase in
minimum nighttime temperatures crop yields declined 10 %.
In Iowa,
minimum nighttime temperatures have been rising more than daytime temperatures since 1970, a trend that is expected to continue.
«
Those minimum nighttime temperatures reflect only the temperature of a shallow layer of air near the surface and not temperatures in the deep layer of the atmosphere.»
But
minimum nighttime temperatures have risen significantly, causing grapes to ripen faster and creating an imbalance between sugar and acid levels.
Not exact matches
It was
minimum, or
nighttime,
temperatures that were particularly warm for June, hitting an average of 1.7 °F above the 20th century average of 55.7 °F.
According to McNider et al., the
minimum temperatures are more a fucntion of heat redistribution during evening hours versus additional
nighttime heat being added by greenhouse gases.
This prediction failure has been due to the climate models assuming that
minimum temperatures (
nighttime temps) are driven by atmospheric CO2 levels, resulting in predicted
minimum temperatures that are too high.
This unique response of RSM to extra soil moisture provided by irrigation is consistent with Christy et al. (2006)'s observational study that found increased
nighttime minimum temperature in California Central Valley during the last century.
Regional Spectral Model produced warmer
nighttime minimum temperature in the summer (HK1) but three other models did not show clear signals.
As estimated from this study, we found a conservative estimate of a warm bias resulting from measuring the
temperature near the ground at just one level of around 0.21 °C per decade (with the
nighttime minimum temperature contributing a large part of this bias).
These issues, which are either not recognized at all in the assessments or are understated, include: - the identification of a warm bias in
nighttime minimum temperatures - poor siting of the instrumentation to measure
temperatures - the influence of trends in surface air water vapor content on
temperature trends - the quantification of uncertainties in the homogenization of surface
temperature data, and the influence of land use / land cover change on surface
temperature trends.
Our paper shows that in such circumstances where
nighttime cooling is reduced systematically over time, i.e., under trends of greater atmospheric greenhouse gases or an increase in cloudiness, the resulting effect will be to increase
minimum temperatures from what they would have been absent the reduced
nighttime cooling.
Model Diagnosis of
Nighttime Minimum Temperature Warming during Summer due to Irrigation in the California Central Valley Hideki Kanamaru and Masao Kanamitsu Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California Abstract This study examines the mechanisms of nighttime minimum temperature warming in the California Central Valley during summer due to irri
Minimum Temperature Warming during Summer due to Irrigation in the California Central Valley Hideki Kanamaru and Masao Kanamitsu Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California Abstract This study examines the mechanisms of nighttime minimum temperature warming in the California Central Valley during summer due to
Temperature Warming during Summer due to Irrigation in the California Central Valley Hideki Kanamaru and Masao Kanamitsu Scripps Institution of Oceanography, University of California, San Diego, La Jolla, California Abstract This study examines the mechanisms of
nighttime minimum temperature warming in the California Central Valley during summer due to irri
minimum temperature warming in the California Central Valley during summer due to
temperature warming in the California Central Valley during summer due to irrigation.
Thanks to Perth Metro's colder inland
minima getting colder (low rainfall and little
nighttime cloud cover), Perth's mean
temperature has been stable and even dropped a tiny bit from 1994 to 2010.
The difference between daytime and
nighttime temperatures is also known as the diurnal
temperature range (DTR — the difference between
minimum and maximum daily
temperature).
However, over this period, the
nighttime minimum temperature increased.
``... most of the warming which has occurred in these regions over the past four decades can be attributed to an increase of mean
minimum (mostly
nighttime)
temperatures....
The net effects of clouds on the
nighttime minimum temperature is small except in the winter high latitudes where the greenhouse warming effect of clouds exceeds their solar cooling effect.