Navigation Links
Toxic mercury, accumulating in the Arctic, springs from a hidden source
Date:5/21/2012

and, and their team used a sophisticated model (GEOS-Chem) of the conditions in the Arctic Ocean and atmosphere to investigate whether variables like melting ice, interactions with microbes, or the amount of sunlight (which affects chemical reactions) could account for the difference.

Incorporating those variables, however, was not enough.

The GEOS-Chem model, which is backed by rigorous environmental observations and more than a decade of scientific review, quantifies the complex nuances of the ocean-ice-atmosphere environment. It takes into account, for example, ocean mixing at various depths, the chemistry of mercury in the ocean and the atmosphere, and the mechanisms of atmospheric deposition and re-emission.

When the Harvard team adapted it for their Arctic mercury simulations, the only adjustment that could explain the spike in summertime concentrations was the incorporation of a large source to the Arctic Ocean from circumpolar rivers. This source had not been recognized previously.

As it turns out, approximately twice as much mercury in the Arctic Ocean originates from the rivers as from the atmosphere.

"At this point we can only speculate as to how the mercury enters the river systems, but it appears that climate change may play a large role," says Jacob. "As global temperatures rise, we begin to see areas of permafrost thawing and releasing mercury that was locked in the soil; we also see the hydrological cycle changing, increasing the amount of runoff from precipitation that enters the rivers."

"Another contributing factor," he adds, "could be runoff from gold, silver, and mercury mines in Siberia, which may be polluting the water nearby. We know next to nothing about these pollution sources."

As the contaminated river water flows into the Arctic Ocean, Jacob says, the surface layer of the ocean becomes supersaturated, leading to what scientists call an "evasion" of mercury from the ocean into
'/>"/>

Contact: Caroline Perry
cperry@seas.harvard.edu
617-496-1351
Harvard University
Source:Eurekalert  

Page: 1 2 3 4

Related medicine news :

1. Toxic Construction Dust in Luxury New York Apartments Endangers Health, Angers Accident Attorneys Like David Perecman
2. WuXi PharmaTech Receives AAALAC Accreditation for Suzhou Toxicology Facility
3. Accelerated radiation therapy reduces toxicity in patients with advanced head and neck cancers
4. Popular nanoparticle causes toxicity in fish, study shows
5. Transplant drug preserves kidneys, avoids toxicity
6. Best Selling, Non Toxic Skin Brightener Does the Job Using Safe, Healthy Ingredients and Introduces New Anti Aging Ingredients
7. Second-hand smoke toxicity in cars: Myth into fact
8. Pharmaceutical companies provide EPA 100 drugs to help predict toxicity
9. Students Target Toxic School Supplies
10. Drug mitigates toxic effects of radiation in mice
11. If the water looks and smells bad, it may be toxic
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Toxic mercury, accumulating in the Arctic, springs from a hidden source
(Date:7/11/2014)... 11, 2014 As transvaginal mesh ... Johnson & Johnson’s Ethicon Inc. unit continue to ... that the Texas Attorney General’s Office has acknowledged ... surgical mesh products used to treat pelvic organ ... report from kens5.com, the probe began nearly two ...
(Date:7/11/2014)... HealthDay Reporter THURSDAY, July 10, 2014 ... was thought to be cured by immediate and aggressive drug ... the AIDS-causing virus in her bloodstream, disappointed federal officials announced ... had remained virus-free even though she stopped taking HIV medications ... remission would open the door to a functional cure for ...
(Date:7/11/2014)... The report, “Specialty Synthetic Fibers & ... - 2018,” defines and segments the specialty synthetic ... and forecast of the volumes and values of ... meta aramids, UHMW Polyethylene, carbon fiber, partially oxidized ... fiber, PBO fiber, and liquid crystal polymer fiber ...
(Date:7/11/2014)... 11, 2014 Operators and ... billion in fuel costs now that model ... current GHG standards are phasing in ... upon themselves to install new features into ... reduction technologies , 2.    Efficient driveline components which ...
(Date:7/11/2014)... CA (PRWEB) July 11, 2014 Ticket Down ... at the Concord Pavilion . When it comes to the ... Luke Bryan. The 37-year-old Georgia native is one of the biggest ... the entertainment business. Bryan is currently out on his “That’s My ... the many stops the tour will be making through the rest ...
Breaking Medicine News(10 mins):Health News:Transvaginal Mesh Lawsuit News: Bernstein Liebhard LLP Notes Report of Texas Probe into Ethicon Pelvic Mesh Marketing 2Health News:Transvaginal Mesh Lawsuit News: Bernstein Liebhard LLP Notes Report of Texas Probe into Ethicon Pelvic Mesh Marketing 3Health News:Transvaginal Mesh Lawsuit News: Bernstein Liebhard LLP Notes Report of Texas Probe into Ethicon Pelvic Mesh Marketing 4Health News:Mississippi Girl Thought Cured of HIV Shows Signs of Infection 2Health News:Mississippi Girl Thought Cured of HIV Shows Signs of Infection 3Health News:Specialty Synthetic Fibers & Glass Fiber Market Poised to Reach $20.1 Billion at a CAGR of 5.2% by 2018 – Report by MarketsandMarkets 2Health News:Specialty Synthetic Fibers & Glass Fiber Market Poised to Reach $20.1 Billion at a CAGR of 5.2% by 2018 – Report by MarketsandMarkets 3Health News:Specialty Synthetic Fibers & Glass Fiber Market Poised to Reach $20.1 Billion at a CAGR of 5.2% by 2018 – Report by MarketsandMarkets 4Health News:LeaseQ Agrees the Latest Round of Greenhouse Gas Rules Could Increase the Cost of Truck Acquisition and Maintenance 2Health News:LeaseQ Agrees the Latest Round of Greenhouse Gas Rules Could Increase the Cost of Truck Acquisition and Maintenance 3Health News:Luke Bryan Ticket Prices Slashed at Concord Pavilion 2Health News:Luke Bryan Ticket Prices Slashed at Concord Pavilion 3
... Oct. 8 Thousands of people around the world ... poetry and speak out to raise awareness and funds ... on Saturday, October 10, 2009. , "Discovering your Voice," ... 2009, stresses the need to hear the voices of ...
... Quantros, a leading provider of safety and quality ... industry, today announced significant updates to its Regulatory ... coincide with National Hospital Quality Measures (NHQM) updates ... will now include expanded tracking of venous thromboembolism ...
... Sysmex America, Inc. today announced that Tom Lindsay ... Sales. Lindsay will be responsible for sales strategy ... and retention of the company,s sales professionals. ... will focus on cross-functional collaboration that enables Sysmex to ...
... 8 American Laser Centers, the leading provider of aesthetic ... CEO, to oversee the continued growth and national expansion of ... ALC,s board of managers, and is responsible for the strategic ... the role of CEO from James McDermott. , American Laser ...
... The University of Guam received an $8,000,000 five-year ... to support a strong national cancer program aimed ... and the impact on minority populations. The grant ... research capabilities at the University of Guam, Increase ...
... Elsevier, a world-leading publisher of medical information products and ... Medical Press (PUMP) it has donated over 5,000 books ... The initiative is supported by the Development Centre for ... book donation is in line with the spirit of ...
Cached Medicine News:Health News:Discovering the Voice of Hospice and Palliative Care Worldwide: World Hospice and Palliative Care Day - October 10, 2009 2Health News:Quantros Expands RRM Solution With New Quality Measures 2Health News:Sysmex America Names National Sales Director 2Health News:American Laser Centers Names Health Care Veteran Steven Straus CEO 2Health News:University of Guam Cancer Research Center receives $8M grant 2Health News:Elsevier's Health Sciences Division and Peking University Medical Press cooperate on book donation 2
(Date:7/10/2014)... 10, 2014  Decision Resources Group finds that ... (ID) specialists are willing to prescribe Durata,s Dalvance ... use as OPAT, approximately two-thirds of the respondents ... their hospital inpatients. However, our findings indicate that ... initiated on OPAT following hospital discharge, and most ...
(Date:7/10/2014)... July 10, 2014 CVS Caremark Corporation (NYSE: ... has approved a quarterly dividend of $0.275 (27.5 cents) per ... on August 1, 2014, to holders of record on July ... CVS Caremark is dedicated to helping people on their path ... the United States . Through the company,s ...
(Date:1/15/2014)... Jan. 15, 2014 Sono-Tek Corporation (OTC BB: SOTK) today ... 30, 2013, compared to sales of $2,202,000 for the prior ... this quarter has also shown growth over the preceding quarter,s ... of this fiscal year. Markets that experienced sales increases over ...
Breaking Medicine Technology:Long-Acting Antibiotics Offering Once-Weekly Dosing Will See Favorable Uptake and Use as Outpatient Parenteral Antimicrobial Therapy (OPAT) 2Long-Acting Antibiotics Offering Once-Weekly Dosing Will See Favorable Uptake and Use as Outpatient Parenteral Antimicrobial Therapy (OPAT) 3Sono-Tek Announces Third Quarter Results 2Sono-Tek Announces Third Quarter Results 3Sono-Tek Announces Third Quarter Results 4
... Mass., Jan. 4, 2012  Halo Therapeutics, LLC, a ... fibrotic diseases, today announced that the United States ... designation for HT-100 for treatment of Duchenne muscular ... neuromuscular disorder, which afflicts approximately 1 in 3,500 ...
... Pa., Jan. 4, 2012  Auxilium Pharmaceuticals, Inc. (Nasdaq: AUXL) ... 30th Annual J.P. Morgan Healthcare Conference to be held ... in San Francisco, CA.  Mr. Adrian Adams, Chief Executive ... of the Company and its product pipeline at 2:00 ...
Cached Medicine Technology:Halo Therapeutics' HT-100 Receives FDA's Orphan Designation for Duchenne Muscular Dystrophy 2Halo Therapeutics' HT-100 Receives FDA's Orphan Designation for Duchenne Muscular Dystrophy 3Auxilium Pharmaceuticals to Present at the 30th Annual J.P. Morgan Healthcare Conference 2Auxilium Pharmaceuticals to Present at the 30th Annual J.P. Morgan Healthcare Conference 3Auxilium Pharmaceuticals to Present at the 30th Annual J.P. Morgan Healthcare Conference 4
... to use instruments for nerve location: our ... stimulator, and muscle locator, together with a ... pencil point needles., ,The RDG Nerve ... to use stimulator, designed to facilitate the ...
... Based on the original MS-III ... electrosurgery certification, enhanced keypad ... ,The MiniStim® MS-IV peripheral ... for neuromuscular monitoring in operating ...
... beyond your investment., ,The Centiva/5 Critical Care ... time demands of the critical care environment. The ... mind combining a compact size with high levels ... valuable space around the patients bed and allows ...
... is combining a lightweight mesh material with the ... hernia plug which stands for a high patient ... material is included in Premilene Mesh LP Self-Forming ... for a softer and less bulky Plug Premilene ...
Medicine Products: