More ‘reactive’ land surfaces cooled the Earth down

Higher reactivity could explain temperature drop before last ice age GFZ GeoForschungsZentrum Potsdam, Helmholtz Centre From time to time, there have been long periods of cooling in Earth’s history. Temperatures had already fallen for more than ten million years before the last ice age began about 2.5 million years ago. At that time the northern…

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Breaking hockey sticks

Resolution and Hockey Sticks, Part Deux: Carbon Dioxide

Guest geological perspective by David Middleton In Part 1 of this series on resolution in signal processing, we discussed the integration of high resolution instrumental temperature records and lower resolution paleoclimate proxy data in climate reconstructions. In Part Deux, we will look at the integration of high resolution instrumental carbon dioxide records and lower resolution…

Broken Hockey Stick

Resolution and Hockey Sticks, Part 1

Guest sciency schist by David Middleton Resolution vs. Detection Geoscientists in the oil & gas industry spend much of our time integrating data sets of vastly different resolutions.  Geological data, primarily well logs, are very high resolution (6 inches to 2 feet vertical resolution).  Geophysical data, primarily reflection seismic surveys, are of much lower and…

Holocene Highstand

The Holocene Sea Level Highstand

Guest geological note by David Middleton Most skeptics are familiar with the Warmunist efforts to erase the Medieval Warm Period and Little Ice Age. However, many skeptics may not be aware of efforts to erase another paleoclimatological feature: The Holocene Highstand. What is a highstand? A highstand is one phase of the sea level cycle…

Middle Miocene Volcanism, Carbon Dioxide and Climate Change

Guest geology lesson by David Middleton What’s wrong with the following paragraph? In Late Jurassic-Early Cretaceous times, Gondwana was split apart, and as rift volcanism and sea-floor spreading developed, ocean temperatures rose and ocean waters were enriched with nutrient elements from volcanic outpourings (along mid-ocean ridges and continental margins or island arcs). Oxygen-isotope analyses of…

140 Years to a PETM-Style Doomsday!!! Another PETM/Chicken Little of the Sea Epic Fail

Guest geology lesson by David Middleton PETM = Paleocene-Eocene Thermal Maximum Research ArticleTemporal Scaling of Carbon Emission and Accumulation Rates: Modern Anthropogenic Emissions Compared to Estimates of PETM Onset Accumulation Philip D. GingerichFirst published: 30 January 2019 […] Plain Language Summary The Paleocene‐Eocene thermal maximum (PETM) is a global greenhouse warming event that happened 56…

No Hockey Sticks: Studies Reveal Long-Term Lack of Warming

A new temperature reconstruction, using proxy temperature measurements from locations in central Asia, has revealed that there has been no warming in the past 432 years. by Vijay Jayaraj The Global Warming “Hiatus” or Pause The word “hiatus” became popular in recent years after the discovery of a pause or hiatus in global warming. There…

Climate change is helping older trees grow better

From the American Geophysical Union and the Mann-o-matic school of treemometer proxies, comes this news that on the surface looks good, but as in the case with any climate news, has disaster lurking in the future. Climate change is giving old trees a growth spurt WASHINGTON–Larch trees in the permafrost forests of northeastern China–the northernmost…