• 13 mins WTI At 7-Month High On Supply Optimism, Kurdistan Referendum
  • 7 hours Permian Still Holds 60-70 Billion Barrels Of Recoverable Oil
  • 12 hours Petrobras Creditors Agree To $6.22 Billion Debt Swap
  • 16 hours Cracks Emerge In OPEC-Russia Oil Output Cut Pact
  • 20 hours Iran Calls On OPEC To Sway Libya, Nigeria To Join Cut
  • 21 hours Chevron To Invest $4B In Permian Production
  • 23 hours U.S.-Backed Forces Retake Syrian Conoco Gas Plant From ISIS
  • 1 day Iraq Says Shell May Not Quit Majnoon Oilfield
  • 3 days Nigerian Oil Output Below 1.8 Million BPD Quota
  • 4 days Colorado Landfills Contain Radioactive Substances From Oil Sector
  • 4 days Phillips 66 Partners To Buy Phillips 66 Assets In $2.4B Deal
  • 4 days Japan Court Slams Tepco With Fukushima Damages Bill
  • 4 days Oil Spills From Pipeline After Syria Army Retakes Oil Field From ISIS
  • 4 days Total Joins Chevron In Gulf Of Mexico Development
  • 4 days Goldman Chief Urges Riyadh To Get Vision 2030 Going
  • 4 days OPEC Talks End Without Recommendation On Output Cut Extension
  • 4 days Jamaican Refinery Expansion Stalls Due To Venezuela’s Financial Woes
  • 4 days India In Talks to Acquire 20 Percent Of UAE Oilfield
  • 5 days The Real Cause Of Peak Gasoline Demand
  • 5 days Hundreds Of Vertical Oil Wells Damaged By Horizontal Fracking
  • 5 days Oil Exempt In Fresh Sanctions On North Korea
  • 5 days Sudan, South Sudan Sign Deal To Boost Oil Output
  • 5 days Peruvian Villagers Shut Down 50 Oil Wells In Protest
  • 5 days Bay Area Sues Big Oil For Billions
  • 5 days Lukoil Looks To Sell Italian Refinery As Crimea Sanctions Intensify
  • 5 days Kurdistan’s Biggest Source Of Oil Funds
  • 6 days Oil Prices On Track For Largest Q3 Gain Since 2004
  • 6 days Reliance Plans To Boost Capacity Of World’s Biggest Oil Refinery
  • 6 days Saudi Aramco May Unveil Financials In Early 2018
  • 6 days Has The EIA Been Overestimating Oil Production?
  • 6 days Taiwan Cuts Off Fossil Fuels To North Korea
  • 6 days Clash In Oil-Rich South Sudan Region Kills At Least 25
  • 6 days Lebanon Passes Oil Taxation Law Ahead Of First Licensing Auction
  • 7 days India’s Oil Majors To Lift Borrowing To Cover Dividends, Capex
  • 7 days Gulf Keystone Plans Further Oil Output Increase In Kurdistan
  • 7 days Venezuela’s Crisis Deepens As Hurricane Approaches
  • 7 days Tension Rises In Oil-Rich Kurdistan
  • 7 days Petrobras To Issue $2B New Bonds, Exchange Shorter-Term Debt
  • 7 days Kuwait Faces New Oil Leak Near Ras al-Zour
  • 8 days Sonatrach Aims To Reform Algiers Energy Laws
Eagle Ford Sees Surge In Production

Eagle Ford Sees Surge In Production

While the Permian Basin dominates…

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