• 7 minutes Reuters: OPEC Ministers Agree In Principle On 1 Million Barrels Per Day Nominal Output Increase
  • 13 minutes Could Venezuela become a net oil importer?
  • 18 minutes Oil prices going Up? NO!
  • 1 hour The Tony Seba report
  • 21 mins Could Venezuela become a net oil importer?
  • 49 mins Harley-Davidson "Made in EU"
  • 3 hours Time Of Recession - China and Europe Are Warning That A Trade War Could Trigger A Global Recession
  • 6 hours Erdogan After Erdogan: New Presidential Mandate After Yesterday's Elections
  • 10 hours LNG Shortage on the Way
  • 5 hours The U.S. Will Soon Give North Korea a Timeline of 'Specific Asks
  • 6 hours Reuters: OPEC Ministers Agree In Principle On 1 Million Barrels Per Day Nominal Output Increase
  • 15 hours Are Electric Vehicles Really Better For The Environment?
  • 2 hours Could oil demand collapse rapidly? Yup, sure could.
  • 53 mins China’s Plastic Waste Ban Will Leave 111 Million Tons of Trash With Nowhere To Go
  • 8 hours Sell out now or hold on?
  • 16 hours OPEC soap opera daily update
  • 16 hours Kenya Eyes 200+ Oil Wells
  • 3 hours Saudi Arabia plans to physically cut off Qatar by moat, nuclear waste and military base
  • 2 hours Oil prices going Up? NO!
Why OPEC+ Needed To Add More Oil

Why OPEC+ Needed To Add More Oil

OPEC’s decision to increase production…

This Russian Oil Major Is Ready To Open The Taps

This Russian Oil Major Is Ready To Open The Taps

Russia’s oil giant Lukoil is…

Using Tree Rings to Understand Previous Climate Changes

It’s been a tough few months for tree-rings, perhaps unfairly. Back in April, we commented on a study [that one of us (Mike) was involved in] that focused on the possibility that there is a threshold on the cooling recorded by tree-ring composites that could limit their ability to capture the short-term cooling signal associated with larger volcanic eruptions. Mostly lost in the discussion, however, was the fact–emphasized in the paper—that the trees appeared to be doing a remarkably good job in capturing the long-term temperature signal—the aspect of greatest relevance in discussions of climate change.

This week there have been two additional studies published raising questions about the interpretation of tree-ring based climate reconstructions.

The first of these by Steinman et al (Mike is again a co-author) appeared in PNAS, and compared evidence of winter precipitation changes in the Pacific Northwest over the past 1500 years using a physical model-based analysis of lake sediment oxygen isotope data to statistical reconstructions of drought based on tree ring data. Steinman et al note that the tree-ring and lake estimates track each other well on multidecadal timescales, but show some divergence in their lower frequency (i.e. centennial and longer timescale) trends. They conclude that this divergence may simply reflect the differing and, in fact, complementary seasonal information reflected by the two proxy records, noting in the abstract:

Differences in seasonal sensitivity between the two proxies allow a more complete understanding of the climate system and likely explain disparities in inferred climate trends over centennial timescales.

Click here for the full article



Join the discussion | Back to homepage

Leave a comment

Leave a comment

Oilprice - The No. 1 Source for Oil & Energy News