Navigation Links
Significant reduction in temperature and vegetation seasonality over northern latitudes
Date:3/10/2013

An international team of authors from 17 institutions in seven countries, including the Woods Hole Research Center, published a study in the journal Nature Climate Change on the 10 March 2013 (10.1038/NCLIMATE1836: http://www.nature.com/nclimate). The study shows that, as the cover of snow and ice in the northern latitudes has diminished in recent years, the temperature over the northern land mass has increased at different rates during the four seasons, causing a reduction in temperature and vegetation seasonality in this area. The temperature and vegetation at northern latitudes increasingly resemble those found several degrees of latitude farther south as recently as 30 years ago.

The NASA-funded study, based on newly improved ground and satellite data sets, examines critically the relationship between changes in temperature and vegetation productivity in northern latitudes. "The amplified warming in the circumpolar area roughly above the Canada-USA border is reducing temperature seasonality over time because the colder seasons are warming more rapidly than the summer," says Liang Xu, a Boston University doctoral student and lead co-author of the study. As a result of the enhanced warming over a longer ground-thaw season, the total amount of heat available for plant growth in these northern latitudes is increasingcreating large patches of vigorously productive vegetation totaling more than a third of the northern landscapeover 9 million km2, which is roughly about the area of the USA.

A key finding of this study is an accelerating greening rate in the Arctic and a decelerating rate in the boreal region, despite a nearly constant rate of temperature seasonality diminishment in these regions over the past 30 years. "Some areas of boreal forest will be negatively impacted by warming temperatures, from increased drought stress as well as insect and fire disturbance, but this work shows that in most high latitude regions we see increased productivity resulting from a reduced range of seasonal temperature variability," says co-author Scott Goetz, a senior scientist at the Woods Hole Research Center. Dr. Goetz's research focuses on ecosystem responses to environmental change, including monitoring and modeling the linkages and feedbacks between forests and climate, land use change and disturbance.

The authors measured seasonality changes using latitude as a yardstick. They first defined reference latitudinal profiles for the quantities being observed and then quantified changes in them over time as shifts along these profiles.

"Arctic plant growth during the early 1980s reference period equaled that of lands north of 64 degrees north. Today, just 30 years later, it equals that of lands above 57 degrees northa reduction in vegetation seasonality of about seven degrees south in latitude," says co-author Prof. Terry Chapin, Professor Emeritus, University of Alaska, Fairbanks. The change equates to a distance of approximately 480 miles southward.

Based on analysis of 17 state-of-the-art climate model simulations, diminishment of temperature seasonality in these regions could be more than 20 degrees in latitude by the end of this century relative to the 1951-1980 reference period. These changes will affect local residents as change occurs in ecosystem services, such as in timber and traditional food production, as a result of warming temperatures. They will also impact the global community through changes in regulatory ecosystem services relating to emissions of greenhouse gases.


'/>"/>

Contact: Ian Vorster
igvorster@gmail.com
508-444-1509
Woods Hole Research Center
Source:Eurekalert

Related biology news :

1. Interventional radiologists see significant symptom relief in MS patients
2. 23andMe identifies 5 significant genetic associations for hypothyroidism
3. In protein folding, internal friction may play a more significant role than previously thought
4. John Theurer Cancer Center presents significant blood cancer research at 2012 ASCO Annual Meeting
5. New understanding of terrestrial formation has significant and far reaching future implications
6. New study: Snacking on raisins significantly reduces overall post-meal blood sugar levels
7. Significant sea-level rise in a 2-degree warming world
8. Queens University Belfast makes significant cancer breakthrough
9. Preeclampsia poses a significant long-term health risk according to new research from Ben-Gurion U.
10. Destroyed coastal habitats produce significant greenhouse gas
11. Chernobyl cleanup workers had significantly increased risk of leukemia
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:1/22/2016)... 2016 http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ... the  "Global Behavioral Biometric Market 2016-2020" ... http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has announced the ... Market 2016-2020"  report to their offering. ... http://www.researchandmarkets.com/research/4lmf2s/global_behavioral ) has announced the addition ...
(Date:1/21/2016)... 21, 2016 --> ... market research report "Emotion Detection and Recognition Market by Technology ... (Facial Expression, Voice Recognition and Others), Services, Application ... to 2020", published by MarketsandMarkets, the global Emotion ... USD 22.65 Billion by 2020, at a CAGR ...
(Date:1/20/2016)...   MedNet Solutions , an innovative SaaS-based eClinical ... research, is pleased to announce the attainment of record-setting ... result of the company,s laser focus on (and growing ... it,s comprehensive, easy-to-use and highly affordable cloud-based technology platform. ... MedNet growth achievements in 2015 include: , ...
Breaking Biology News(10 mins):
(Date:2/4/2016)... 4, 2016 ContraVir Pharmaceuticals, Inc. (NASDAQ: ... and commercialization of targeted antiviral therapies, announced today that ... 2016, to be held February 8-9, 2016, at the ... Disruptive Growth & Healthcare Conference, taking place in ... James Sapirstein , Chief Executive Officer of ...
(Date:2/4/2016)... ... ... Many of the engineers at FireflySci, Inc. have been manufacturing quartz and ... cuvette manufacturers is their supercharged customer service and their extensive database of glass cuvette ... of inside information, they have recently revamped their manufacturing techniques to reduce lead times ...
(Date:2/3/2016)... 3, 2016 Harvard Apparatus Regenerative Technology, ... developing bioengineered organ implants for life-threatening conditions of ... CEO Jim McGorry , will present at ... on Tuesday, February 9, 2016 at 8:00 am ... . HART,s presentation will be webcast live and ...
(Date:2/3/2016)... Milpitas, Calif. (PRWEB) , ... February 03, 2016 ... ... supply chain events annual report which summarizes and analyzes nearly 750 ... global event monitoring, alert, and analysis service. , Supply chain risk management ...
Breaking Biology Technology: