Navigation Links
Arctic study sheds light on tree-ring divergence problem
Date:5/7/2014

SAN FRANCISCO -- Changes in tree-ring density in the Arctic may be evidence of changes in light intensity during the trees' growth, according to a new study by San Francisco State University researcher Alexander Stine.

The finding has direct implications for the tree-ring "divergence problem," a phenomenon that has received considerable media attention but has been widely misinterpreted, said Stine, an assistant professor of Earth & climate sciences.

Tree rings consist of a low density ring, which forms early in the growing season, and a high density ring that forms late in the growing season. In colder parts of the world, the dense latewood rings tend to be denser during warm years. Temperature records inferred from Arctic tree rings do a good job of tracking temperature up until the 1960s, but subsequent Arctic tree-ring densities did not keep pace with increases in temperature, a discrepancy that is called the divergence problem.

Climate scientists have been aware of the divergence problem for some time, and it was mentioned in the emails from the Climatic Research Unit at the University of East Anglia, where it became the focus of attention during the 2009 "Climategate" controversy.

The divergence is not a problem for understanding modern climate change in the Arctic, Stine explained, "because we have thermometers and those thermometers tell us it's warming. But it's a problem because if we want to use these tree rings as a proxy for temperatures of the past, we need to make sure that we understand what's happening now."

Stine sees the new findings as the "bright side" of the divergence problem, one which he hopes will lead to a more informed discussion about climate change. "We could learn more about past variations in light intensity at the Earth's surface, and we may be able to deepen our understanding of both trees and climate."

With his colleague Peter Huybers at Harvard University, Stine set out t
'/>"/>

Contact: Jonathan Morales
jmm1@sfsu.edu
415-338-1743
San Francisco State University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. Distinct avian influenza viruses found in Antarctic penguins
2. River ice reveals new twist on Arctic melt
3. Researchers reveal the dynamics behind Arctic ecosystems
4. Antarctic moss lives after 1,500+ years under ice
5. Computer model predicts vastly different ecosystem in Antarcticas Ross Sea in the coming century
6. Arctic 2050: Towards ecosystem-based management in a changing Arctic Ocean
7. Alps to Appalachia; submarine channels to Tibetan plateau; Death Valley to arctic Canada
8. Study projects big thaw for Antarctic sea ice
9. Keeping the world safe for miso soup and Brazilian beans, arctic seed vault welcomes new treasures
10. Arctic biodiversity under serious threat from climate change according to new report
11. €2M EU funding for UEA project to understand Arctic ice melt
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/30/2014)... today published new research from Bjorn Brembs, professor of ... Germany, with a proof-of-concept figure allowing readers and reviewers ... This represents an important leap forward for scientific ... the quality of a scholarly output. , Figure 3 ... data and their code to F1000Research , and ...
(Date:7/30/2014)... Steven Chown has been awarded the Scientific Committee ... in Antarctic Research. , SCAR, an inter-disciplinary international ... international scientific research in the Antarctic region, and ... the Earth system. The organisation also provides scientific ... responsible for governing the region. , The medal ...
(Date:7/30/2014)... in cancer treatment has been shown to relieve ... for neural transmission between the peripheral and central ... Institute of Radiation Medicine, Chinese Academy of Medical ... into rat dorsal root ganglia (DRG) to provide ... radioactivity (0, 14.8, 29.6 MBq) were implanted separately ...
Breaking Biology News(10 mins):F1000Research brings static research figures to life 2
... Harnessing the strength of a natural process that ... from UT Southwestern Medical Center has helped establish ... and permanently correct mutations in disease-causing genes. , ... By artificially initiating a DNA repair process known ...
... Scientists studying mice have identified a gene that allows ... the inflammatory chemicals they secrete. , Researchers at Washington ... knocking the gene out in mice prevented the development ... of their own damaging secretions. , The newly identified ...
... by Professor Hans-Georg Kräusslich at Heidelberg University Hospitals, ... Tumor Virology of the Deutsches Krebsforschungszentrum (German Cancer ... label Human Immunodeficiency Viruses (HIV) for visual investigations ... , The labeling permits scientists to observe the ...
Cached Biology News:Researchers pioneer new gene therapy technique using natural repair process 2Researchers pioneer new gene therapy technique using natural repair process 3Disabling gene defuses rheumatoid arthritis in mice 2Disabling gene defuses rheumatoid arthritis in mice 3New Species of Coral Discovered Off Southern California 2
(Date:7/30/2014)... July 30, 2014  RXi Pharmaceuticals Corporation ... company focused on discovering, developing and commercializing ... using RNA-targeted technologies, today announced that their ... for the reduction of recurrence of hypertrophic ... been initiated. Logo - ...
(Date:7/30/2014)... Diego, CA (PRWEB) July 30, 2014 ... contract from the U.S. Environmental Protection Agency (EPA). ... expertise in developmental toxicity models, including tests designed ... neuron formation and the formation of connections between ... Inhibition of neurodifferentiation and synapse formation by environmental ...
(Date:7/30/2014)... (PRWEB) July 30, 2014 LayerBio, Inc., ... completion of its first round of seed financing from ... enable preliminary efforts to develop a novel sustained-release product ... of our investors and their commitment to this important ... LayerBio. "Ophthalmology is one of many areas in which ...
(Date:7/29/2014)... of significant technological challenges in their quest to ... for the James Webb Space Telescope. , The ... scientist at NASA,s Goddard Space Flight Center in ... arrays that is, those activated by applying ... the current technology,s magnetically activated arrays. This advance ...
Breaking Biology Technology:RXi Pharmaceuticals Expands Clinical Program with Initiation of Third Phase 2a Study with RXI-109 for Treatment of Hypertrophic Scars 2RXi Pharmaceuticals Expands Clinical Program with Initiation of Third Phase 2a Study with RXI-109 for Treatment of Hypertrophic Scars 3RXi Pharmaceuticals Expands Clinical Program with Initiation of Third Phase 2a Study with RXI-109 for Treatment of Hypertrophic Scars 4RXi Pharmaceuticals Expands Clinical Program with Initiation of Third Phase 2a Study with RXI-109 for Treatment of Hypertrophic Scars 5U.S. Environmental Protection Agency (EPA) Awards Vala Sciences a Second ToxCast Contract 2U.S. Environmental Protection Agency (EPA) Awards Vala Sciences a Second ToxCast Contract 3Revolutionary microshutter technology hurdles significant challenges 2Revolutionary microshutter technology hurdles significant challenges 3Revolutionary microshutter technology hurdles significant challenges 4
... are quickly eliminated from the body. Scientists at the ... a kind of molecular balloon that swells and thus ... The TUM spin-off XL-protein GmbH has now started to ... People who suffer from hepatitis B are often treated ...
... WOBURN, Mass., Sept. 21 The Center for Business Intelligence ... the proceeds from their Alzheimer,s Drug Development Summit to the ... this week, September 21-25, 2009, in recognition of World Alzheimer,s ... Alzheimer,s associations, globally, to raise awareness and encourage citizens to ...
... NEW YORK, Sept. 21 Emissary Capital Group, ... (OTC Bulletin Board: SNBP) with a Buy rating and ... domestically as Dong Ying Pharmaceutical Co. Ltd., is a ... R&D, manufacture and distribution of biopharmaceutical products. The ...
Cached Biology Technology:Researchers prolong the plasma half-life of biopharmaceutical proteins 2Alzheimer's Drug Development Summit: CBI to Donate Portion of This Week's Proceeds to the Alzheimer's Association 2Alzheimer's Drug Development Summit: CBI to Donate Portion of This Week's Proceeds to the Alzheimer's Association 3Emissary Capital Group Initiates Coverage on Sinobiopharma 2
Request Info...
Rabbit polyclonal to UBC12 (rating: ****) ( Abpromise for all tested applications). Antigen: Synthetic peptide: RGGYIGSTYFER, corresponding to amino acids 169-180 of UBC12 Entrez Gene ID: 90...
Applications: Beadlyte® assay Stability: 2 years at 4°C (lyophilized) or 6 months at -20°C (rehydrated) ...
... 96 Well BAC Prep; Ideal ... from 1.5ml 2xYT cultures; Provides ... fluorescent sequencing for small to ... strategy which minimizes shearing and ...
Biology Products: