Navigation Links
AGU journal highlights -- August 6, 2008
Date:8/6/2008

1. Recent African drought heralds drier conditions to come

Human-induced climate change is projected to cause drier conditions in the midlatitudes. To assess whether the onset of drier conditions has already begun, Touchan et al. study newly developed multicentury tree ring records from Tunisia and Algeria for a longer-term perspective on drought in northwestern Africa. Using a new set of 13 chronologies from Atlas cedars (Cedrus atlantica) and Aleppo pines (Pinus halepensis), the authors analyze the widths of individual tree rings, following the basic principle that thinner bands indicate years when water was relatively scarce. Through this, they reconstruct the region's Palmer Drought Severity Index, an index of dryness based on precipitation and temperature, for the years between 1456 and 2002. The reconstruction reveals the magnitude of droughts from the historic record, despite there having been no instruments to record these droughts. Interestingly, the most recent drought (1999?) appears to be the worst since at least the middle of the fifteenth century. This drought is consistent with early signatures of a transition to more arid midlatitude conditions, as projected by several climate models.

Title:

Long term context for recent drought in northwestern Africa

Authors:

Ramzi Touchan, David M. Melo, and Christopher Baisan: Laboratory of Tree-Ring Research, University of Arizona, Tucson, Arizona, U.S.A.

Kevin J. Anchukaitis: Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York, U.S.A.;

Said Attalah: Department of Agronomy, Faculty of Science, University of Ourgla, Ourgla, Algeria;

Ali Aloui: Institute of Sylvo-Pastoral of Tabarka, Tabarka, Tunisia.

Source:

Geophysical Research Letters (GRL) paper 10.1029/2008GL034264, 2008; http://dx.doi.org/10.1029/2008GL034264



'/>"/>

Contact: Peter Weiss
pweiss@agu.org
202-777-7507
American Geophysical Union
Source:Eurekalert

Page: 1 2 3 4 5 6 7

Related biology news :

1. Highlights from the August 2008 Journal of the American Dietetic Association
2. AGU journal highlights -- July 23, 2008
3. Tips from the Journals of the American Society for Microbiology
4. Louisiana Tech researchers feature drug reformulation in prestigious journal
5. Significant impact factor boost for scientific journal Genome Research
6. News tips from the Journal of Neuroscience
7. Highlights from the July 2008 Journal of the American Dietetic Association
8. Impact Factor names Cell top research journal
9. Highlights from the June 2008 Journal of the American Dietetic Association
10. MBL awards journalism fellowships
11. Federal polar bear research critically flawed, says study in INFORMS journal
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/23/2015)... 2015 NXT-ID, Inc. (NASDAQ: NXTD ... authentication company focused on the growing mobile commerce market, ... for DISTRIBUTED VOICE DIRECTED PAYMENT METHOD AND ... new groundbreaking payment method. Payment accounts may be selected ... be accessed if both the speech (the word associated ...
(Date:2/18/2015)... Calif. , Feb. 18, 2015  Cepheid (NASDAQ: ... speaking at the following conferences, and invited investors to participate ... Boston, MA Tuesday, March 3, 2015 ... Investors Conference, Orlando, FL Wednesday, March ... Live Webcasts To access the live webcasts for these events, ...
(Date:2/12/2015)... Minn. , Feb. 12, 2015   ... company specializing in clinical study management systems, has ... Program , further distinguishing iMedNet ... Clinical Research Organizations (CROs) and healthcare consultants.  Building ... support, prospective customer referrals and numerous co-marketing opportunities), ...
Breaking Biology News(10 mins):NXT-ID Patents Voice Directed Payments 2NXT-ID Patents Voice Directed Payments 3Cepheid to Webcast Upcoming Financial Presentations 2MedNet Solutions Announces Key Enhancements To Its iMedNet Partner Program 2
... call; most lack or have only rudimentary vocal cords. A ... and then silently signals her beau. But the female ... of declaring her interest: She emits a high-pitched chirp that ... This is one of several unusual frog-related findings reported ...
... and Java ... ... high-precision biometric identification technologies, today announced,the availability of MegaMatcher 2.1 ... and multi-biometric,face-fingerprint identification systems. MegaMatcher 2.1 includes a number,of new ...
... N.J., May 9 BIO-key International, Inc.,(OTC Bulletin Board: BKYI) ... Thursday, May 15, 2008 before the market opens.,In conjunction with ... broadcast live over the Internet on Thursday, May 15, 2008 ... International, Inc. First Quarter 2008 Earnings Conference ...
Cached Biology News:Female concave-eared frogs draw mates with ultrasonic calls 2Female concave-eared frogs draw mates with ultrasonic calls 3Neurotechnology Announces MegaMatcher 2.1 SDK for Development of Large-scale AFIS and Multi-biometric Face-Fingerprint Identification Systems 2Neurotechnology Announces MegaMatcher 2.1 SDK for Development of Large-scale AFIS and Multi-biometric Face-Fingerprint Identification Systems 3Neurotechnology Announces MegaMatcher 2.1 SDK for Development of Large-scale AFIS and Multi-biometric Face-Fingerprint Identification Systems 4BIO-key(R) Announces First Quarter 2008 Earnings Release and Conference Call Schedule 2
(Date:3/2/2015)...  Asterias Biotherapeutics, Inc. (NYSE MKT: AST), a leading ... today announced that it will release fourth quarter and ... March 10, 2015 after the close of the U.S. ... and webcast on Tuesday, March 10, 2015 at 4:30 ... results and recent corporate developments. For both ...
(Date:3/2/2015)... Global Stem Cells Group.com ... Shenzhen HANK Bioengineering Co., Ltd. and its Chinese-American ... establish a stem cells training course in the ... 2015. , Shenzhen HANK is a biotechnology company ... microbiologist and virologist, to integrate research, development, production, ...
(Date:2/28/2015)... Increasing its efforts to resolve the ... three episodes of The GMO TRUTH podcast on both ITunes ... it continues its mission to discover the truth and change ... to “uncover the truth about the GMOs in our food ... Truth Podcast is an expansion of the documentary/investigative film-making methodology ...
(Date:2/27/2015)... 2015  Pharmacyclics, Inc. (NASDAQ: PCYC ... its newly developed Bruton,s tyrosine kinase (BTK) inhibitor ... The results of these preclinical evaluations have been ... The feedback received from the Agency is supportive ... Additional preclinical work is required to begin a ...
Breaking Biology Technology:Asterias Biotherapeutics to Report Fourth Quarter and Full Year 2014 Results on March 10, 2015 2Global Stem Cells Group Announces Alliance with HANK Bioengineering Co., Ltd. in Shenzhen, China 2Global Stem Cells Group Announces Alliance with HANK Bioengineering Co., Ltd. in Shenzhen, China 3The Walk a Mile Project Launches “GMO Truth” Podcast 2Pharmacyclics Provides Clinical Update on BTK Inhibitor for Autoimmune Diseases 2Pharmacyclics Provides Clinical Update on BTK Inhibitor for Autoimmune Diseases 3
... Monogram announces availability of HERmark and HER1 and HER3 ... Assays ... June 2 Monogram,Biosciences, Inc. (Nasdaq: MGRM ) ... on HERmark(TM),the company,s novel oncology assay, as a means ...
... (TSH),Canada,s largest urban community hospital, has selected Chyma(TM) ... The,implementation of Chyma(TM) for their team of more ... departments at the two hospital campuses and will,soon ... "Chyma(TM) reflects the commitment of the Scarborough ...
... 2 The following release was,issued today by Thomas P. ... the New York State Common Retirement Fund, the Lead Plaintiff,in ... UNITED STATES DISTRICT COURT NORTHERN DISTRICT OF CALIFORNIA ... MCK ) SECURITIES LITIGATION, Master File No. 99-CV-20743 ...
Cached Biology Technology:Monogram Announces Presentation of Clinical Data for the HERmark(TM) Breast Cancer Assay at the 44th ASCO Annual Meeting 2Monogram Announces Presentation of Clinical Data for the HERmark(TM) Breast Cancer Assay at the 44th ASCO Annual Meeting 3Monogram Announces Presentation of Clinical Data for the HERmark(TM) Breast Cancer Assay at the 44th ASCO Annual Meeting 4Monogram Announces Presentation of Clinical Data for the HERmark(TM) Breast Cancer Assay at the 44th ASCO Annual Meeting 5Monogram Announces Presentation of Clinical Data for the HERmark(TM) Breast Cancer Assay at the 44th ASCO Annual Meeting 6Canada's Largest Urban Community Hospital Chooses Chyma(TM) On-Call Physician Scheduling Technology 2Notice of Initial Distribution of Net Settlement Funds 2Notice of Initial Distribution of Net Settlement Funds 3
... Miscellaneous: Versatile stain for staining RNA (bluish-purple), DNA ... Assay: TLC ≥ 90 % Cation traces: Ca ... 5 mg/kg Cr ≤ 5 mg/kg Cu ≤ 5 ... Mg ≤ 5 mg/kg Mn ≤ 5 mg/kg Na ...
BioGenex IHC Kits for Rodent Tissues are designed for immunohistochemistry on rodent and rabbit tissues that are closely related to the source of the primary antibody. This kit comes with rat seconda...
... The BioGenex Super Sensitive ... is a novel product ... non-biotin polymeric technology. This ... signal to noise ratio ...
... Engine Dyad thermal cycler is a ... The chassis accommodates a variety of ... which hold different types and numbers ... programming with point-and-click navigation. Peltier heat ...
Biology Products: