Postscript: Not exactly on topic, but one thing that is never, ever mentioned in the press but is generally true about temperature trends — almost all of the warming we have seen is
in nighttime temperatures, rather than day time.
There has also been a dramatic increase
in nighttime temperatures in the US, reducing the number of critically important relief windows during heat waves.
After an 11 - year inquiry, a group of Asian and American researchers found a 10 percent drop in rice - crop yields for every increase
in nighttime temperatures of 1.8 degrees Fahrenheit.
Nic, one other consideration of nighttime air temps is that the diurnal temperature range has been documented to have narrowed 0.066 C / decade from 1950 - 2004 according to Vose (2005) Almost all of this rise is
in nighttime temperature.
Grant, is it clear that you're looking at variation
in nighttime temperature records due to two very different causes?
Not exact matches
With average
nighttime temperatures up 1.8 degrees F at the institute's farm
in the Philippines from 1979 to 2003, average yields were down 10 percent.
Warming has occurred
in both land and ocean domains, and
in both sea surface
temperature (SST) and
nighttime marine air
temperature over the oceans.
In most cases, deserts possess a high average
temperature with large differences between daytime and
nighttime temperatures.
And while that high ranking was fueled
in part by a major heat wave out West, a big factor was the very warm
nighttime temperatures across a large swath of the country.
That trend
in increasing
nighttime low
temperatures is expected to continue for the entire
In many cases,
nighttime low
temperatures are increasing more rapidly than daytime high
temperatures.
«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.»
And sap can only be harvested
in the spring when
nighttime temperatures don't dip below the mid 20s and daytime highs don't top about 45.»
This is based on personal experience with my (much older) Civic with a non-new battery and similar driving patterns
in the winter with typical
nighttime temperatures around 28 - 34 F.
During the winter,
temperatures in Vallarta are
in the low to mid 80's during the day with
nighttime temperatures ranging from the 60 - 70 ° F. Summertime (June to October) is Vallarta's rainy season with
temperatures ranging from the mid 80's to low 90's.
The average mean
temperature in January ranges from 53 - 59 degrees F; summers are a little warmer with an average mean
temperature in July that ranges from 62 - 70 degrees F. Both winter and summer
temperature extremes are moderated by the moist ocean air with generally high
nighttime humidities and frequent fog.
When heatwaves and record
temperatures are found all across North America, Belize enjoys lovely weather
in August with daytime highs of just 86F (30C) and
nighttime lows at a perfect 78F (26C).
The town is the very essence of the Southern California lifestyle, with
temperatures ranging from highs of 77 degrees
in the summer to 67 degrees
in winter and
nighttime temperatures that rarely below 50 degrees.
Drier winds from the west usher
in the «Little Dry» period because those dramatic
nighttime storms and spontaneous daytime showers lessen while
temperatures remain between 78 - and 86 - degrees at this time of year.
With an average daytime high
temperature of 80 ˚F
in the shade and
nighttime lows averaging 70 ˚F you are sure to enjoy countless comfortable hours
in your balcony hammock, al fresco dining, or sipping a frothy tropical cocktail
in one of our spring pools or our private Arenal hot springs.
Belize Weather
in July When your nearest and dearest complain about heat waves back home, you may find it irresistible to let them know that Belize
nighttime temperatures are around 79 - degrees F. Morning rains are so cooling, they will help you transition into your plans for an outdoor adventure like diving the Belize reef.
Scientists sifting for trends
in record high and low
temperatures across the United States have found more evidence of long - term warming of the climate, with the biggest shift coming through a reduction
in record low
nighttime temperatures.
Global climate models have successfully predicted the rise
in temperature as greenhouse gases increased, the cooling of the stratosphere as the troposphere warmed, polar amplification due the ice - albedo effect and other effects, greater increase
in nighttime than
in daytime
temperatures, and the magnitude and duration of the cooling from the eruption of Mount Pinatubo.
The morning LOW
temperature in Florida on 5/17/2016 (the date the above satellite photo was captured) tied all time record of 78 degrees (again, 78 degrees was the
nighttime LOW
temperature).
In Iowa, minimum
nighttime temperatures have been rising more than daytime
temperatures since 1970, a trend that is expected to continue.
In cities like Phoenix with bad UHI problems, the mean
temperature has increased because
nighttime temperatures don't cool much any more.
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.
1) On dry savannas
in Africa the surface
temperature of clear climate during daytime can reach about 50 C, but during
nighttime can cool down until about zero C. However, CO2 content
in atmosphere during all the time is the same, which proves that the carbon dioxide as greenhouse gas
in atmosphere has no distinguishable influence on climate
temperature.
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.
The daytime
temperatures in the Libyan desert can exceed 45 C, whilst
nighttime temperatures drop below freezing.
MF says: «The daytime
temperatures in the Libyan desert can exceed 45 C, whilst
nighttime temperatures drop below freezing.
NOAA Coral Reef Watch (CRW) thermal stress products used
in this study were based on
nighttime - only Advanced Very High Resolution Radiometer (AVHRR) sea surface
temperature (SST) data from sensors aboard operational NOAA Polar - Orbiting Environmental Satellites (POES), produced
in near - real - time at 0.5 - degree (50 - km) spatial resolution.
The point is that lack of your wondrous GHGs results
in higher daytime
temperatures, and lower
nighttime temperatures,
in accordance with normal, rather than Warmist, physics.
The NOAA says
in 2012, only
nighttime (TMIN)
temperatures helped put July 2012 slightly ahead
in average
temperatures (TAVG).
What is left is that insolation,
in the morning, with no change
in temperature, is continuously converting airborne water colloid to WV at the rate of 2400 W / g (m ²); with continuous reversion back to airborne water colloid releasing that same 2400 W / g (m ²) to space via EMR
in the
nighttime.
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.
«While
nighttime temperatures have risen, there has been no change
in summer
nighttime temperatures in the adjacent Sierra Nevada mountains.
From that I don't know what relative effects happen
in the
nighttime set, but it seems to me that it would be most extreme then, because as anyone familiar with high country will confirm, not only are
temperatures cooler
in general, but there is a larger daily variation at higher altitudes.
What this means is that because (a) the land surface
temperature record does
in fact combine
temperature measurements of light wind and windy nights and (b) there has been a reduction
in nighttime cooling, the long - term
temperature record may be contaminated by a warm bias that accentuates the observed trend of warmer
temperatures.
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
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
in the California Central Valley during summer due to irrigation.
Christy mentions an increase
in nighttime low
temperatures by 5.5 F between 1910 and 2003.
Prolonged periods of high
temperatures and the persistence of high
nighttime temperatures have increased
in many locations (especially
in urban areas) over the past half century.
During extreme heat events,
nighttime temperatures in the region's big cities are generally several degrees higher28 than surrounding regions, leading to increased heat - related death among those less able to recover from the heat of the day.36 Since the hottest days
in the Northeast are often associated with high concentrations of ground - level ozone and other pollutants, 37 the combination of heat stress and poor air quality can pose a major health risk to vulnerable groups: young children, the elderly, and those with pre-existing health conditions including asthma.29 Vulnerability is further increased as key infrastructure, including electricity for potentially life - saving air conditioning, is more likely to fail precisely when it is most needed — when demand exceeds available supply.
Using data from 765,000 survey respondents
in the United States from 2002 to 2011, coupled with
nighttime temperature data, the researchers found that higher
nighttime temperatures are associated with self - reported sleep problems, with the largest effects seen during summer and among lower - income and elderly subjects (who may not have easy access to air conditioning).
I went to great length trying to explain to you that when you observe increasing or decreasing delta
in daytime high
temperature and
nighttime low
temperature it is almost certainly due to concommitant trend
in absolute humidity.
In recent decades the ITCZ has been migrating north moving it farther away from Easter Island and as that distance increases absolute humidity over Easter Island will necessarily decrease which necessarily means in increasing temperature delta between daytime high and nighttime lo
In recent decades the ITCZ has been migrating north moving it farther away from Easter Island and as that distance increases absolute humidity over Easter Island will necessarily decrease which necessarily means
in increasing temperature delta between daytime high and nighttime lo
in increasing
temperature delta between daytime high and
nighttime low.
Bottom line is if there were no greenhouse gases
in the atmosphere like on the moon, daytime high
temperatures at the equator
in the spring and fall would exceed the boiling point of water and of course
nighttime temperatures would plunge far below freezing.
If water vapor has an amplifying effect as climate modelers claim, why is the daily mean
temperature in a dry, desert area warmer (
in spite of
nighttime cooling) than a humid tropical area at the same latitude?