by Roland Hirsch
New technologies in mass spectrometry are advancing research in climate science
by Roland Hirsch
New technologies in mass spectrometry are advancing research in climate science
Posted in Data and observations
By Nic Lewis
There have been further interesting developments in this story Continue reading
Posted in Data and observations, Oceans, Uncertainty
By Nic Lewis
Introduction
The Resplandy et al. (2018) ocean heat uptake study (henceforth Resplandy18) is based on measured changes in the O2/N2 ratio of air sampled each year, compared to air stored in high pressure tanks originally sampled in the late 1980s and early 1990s, and in atmospheric CO2 concentration. These are combined to produce an estimate (ΔAPOObs) of changes in atmospheric potential oxygen since 1991 (ΔAPO). They break this series down into four components, including one attributable to ocean warming (ΔAPOClimate). By estimating the other three, they isolate the implied ΔAPOClimate and use it to estimate the change in ocean heat content. In two recent articles, here and here, I set out why I thought the trend in ΔAPOClimate – from which they derived their ocean heat uptake estimate – was overstated, and its uncertainty greatly understated. Continue reading
Posted in Data and observations, Oceans, Uncertainty
by Nic Lewis
Obviously doubtful claims about new research regarding ocean content reveal how unquestioning Nature, climate scientists and the MSM are. Continue reading
Posted in Data and observations, Oceans, Uncertainty
by Tony Brown
This article examines the continued cooling of CET this century
Posted in Attribution, Data and observations, History
by Judith Curry
Part IV of the Climate Etc. series on sea level rise focuses on the satellite era (since 1993), including the recent causes of sea level variations and arguments regarding the acceleration (or not) of recent sea level rise.
Posted in Data and observations, Oceans
By Judith Curry
“We are in the uncomfortable position of extrapolating into the next century without understanding the last.” – Walter Munk
Posted in Data and observations, Oceans
by Javier
A possible mechanism for the effect of solar variability on climate, whereby solar variability acts over the stratospheric pressure system transmitting the changes top-down, and over ocean temperatures bottom-up.
Posted in Adaptation, Data and observations
by Javier
In Part A, we established the existence of a ~ 2400-year climate cycle, discovered in 1968 by Roger Bray. This climate cycle correlates in period and phase with a ~ 2400-year cycle in the production of cosmogenic isotopes, that corresponds with clusters of solar grand minima at times of abrupt cooling and climate deterioration. The relationship between solar activity and cosmogenic isotope production during the past centuries confirms the ~ 2400-year solar cycle as the origin of the climate cycle.
Posted in Data and observations
By Javier
The existence of a ~ 2400-year climate cycle, discovered in 1968 by Roger Bray, is supported by abundant evidence from vegetation changes, glacier re-advances, atmospheric changes reflected in alterations in wind patterns, oceanic temperature and salinity changes, drift ice abundance, and changes in precipitation and temperature. This is established with proxy records from many parts of the world.
Posted in Attribution, Data and observations
by Javier
The Neoglacial has been a period of progressive cooling, increasing aridity, and advancing glaciers, culminating in the Little Ice Age. The main Holocene climatic cycle of ~ 2400 years delimits periods of more stable climatic conditions which were identified over a century ago. The stable periods are punctuated by abrupt changes.
Posted in Attribution, Data and observations
Posted in Attribution, Data and observations
by Judith Curry
Not surprisingly, John Bates’ blog post and David Rose’s article in the Mail on Sunday have been receiving some substantial attention.
Posted in Data and observations, Ethics
by Monte Naylor
A comparison of NOAA-computed temperature trends with the “raw” historical temperature data.
Posted in Data and observations
by Judith Curry
Two new papers have focused on the quality, uncertainties and interpretation of global sea surface temperature data.
Posted in Data and observations, Oceans
by Turbulent Eddie
Adjusted USHCN data indicate a decrease in CONUS hot days TMAX >= 100°F
Posted in Data and observations
by Frank Bosse
Separating out the impacts of internal variability on evaluations of TCR.
by Alan Longhurst
Because the climate change science community habitually concentrates attention on surface data from a very short recent period – nominally a little more than 100 years – it would be very interesting to know how the pattern habitually derived from these data compares with longer data archives that have been processed independently by the observing nations.
Posted in Data and observations
By Judith Curry
It is therefore suggested to use either the more robust tropospheric temperature or ocean surface temperature in studies of climate sensitivity. – Cederlof, Bengtsson, Hodges
Posted in Data and observations
by Greg Goodman
Several of the major datasets that claim to represent “global average surface temperature” are directly or effectively averaging land air temperatures with sea surface temperatures.
by Zeke Hausfather
Measuring temperatures in the U.S. no easy task. While we have mostly volunteer-run weather station data from across the country going back to the late 1800s, these weather stations were never set up to consistently monitor long-term changes to the climate.
Posted in Data and observations
by Judith Curry
30 year trends of temperature are shown to be lower, using well-sited high quality NOAA weather stations that do not require adjustments to the data.
Posted in Data and observations