Navigation Links
Microfossils unravel climate history of tropical Africa

roded. The researchers developed an entirely new proxy for the annual mean air temperature on land, based on molecules from the cell membrane of soil inhabiting bacteria. They analysed eroded soil material in a sediment core in the outflow area of the river Congo in the South Atlantic Ocean at a depth of almost 1000m. Since the Congo River drains a large part of tropical central Africa, the land derived material gives an integrated signal for a very large area.

Cool tropical Africa

The new proxy was used in this sediment core to obtain both a continental and a sea surface temperature record. A comparison of both records shows that ocean surface and land temperatures behaved differently during the past 25,000 years. During the last ice age, temperatures over tropical Africa were 21°C, about 4°C lower than today, whereas the tropical Atlantic Ocean was only about 2.5°C colder. By comparing this temperature difference with existing records of continental rainfall variability, lead author Johan Weijers and his colleagues concluded that the land-sea temperature difference has by far the largest influence on continental rainfall. This can be explained by the strong relationship of air pressure to temperature. When the temperature of the sea surface is higher than that of the continent, stronger offshore winds reduce the flow of moist sea air onto the African continent. This occurred during the last ice age and, as a consequence, the land climate in tropical Africa was drier than it is in today's world, where it favours the growth of a lush rainforest. These results provide further insight into the natural variation of climate and the possible consequences of a warming earth on precipitation in central Africa.


'"/>

Source:Netherlands Organization for Scientific Research


Page: 1 2

Related biology news :

1. PET/MRI scans may help unravel mechanisms of prenatal drug damage
2. A puzzle piece found in unraveling the wiring of the brain
3. Scientists journey to southern Africa to unravel the secret world of elephant communication
4. ORNL, UC Berkeley unravel real-world clues to Earths mysteries
5. UT Southwestern researchers unravel control of growing blood vessels
6. University of Arizona plant scientists to unravel maize genome
7. UW scientists unravel critical genetic puzzle for flu virus replication
8. Researchers unravel DNA tangles and enzyme seamstresses
9. UGA scientists unravel molecular inch-worm structure of walking-pneumonia bacterium
10. UCLA researchers unravel a mystery about DNA
11. Computer scientists unravel language of surgery
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Microfossils unravel climate history tropical Africa

(Date:9/18/2014)... DNA, tiny strands of nucleic acid that contain instructions ... genetic data, our DNA is copied into RNA molecules, ... tasks in our cells. , Several years ago, ... all other known RNAs, this molecule is circular, and ... little has been known about how they are produced. ...
(Date:9/18/2014)... 18, 2014Many Americans across racial and ethnic groups ... impact on their day-to-day life, more so than ... and speech (57% of African-Americans, 49% of non-Hispanic ... When asked which disease or ailment is the ... first among African-Americans followed by AIDS/HIV. Hispanics ...
(Date:9/18/2014)... which have devastated algal forests in the eastern Mediterranean ... basin if their distribution continues to expand as the ... an international team of researchers led by Dr Adriana ... the Mediterranean Institute for Advanced Studies in Spain, is ... of the team surveyed more than 1000 kilometres of ...
Breaking Biology News(10 mins):Scientists find how mysterious 'circular RNA' is formed, claim muscular dystrophy link 2Americans rate losing eyesight as having greatest impact on their lives 2Americans rate losing eyesight as having greatest impact on their lives 3Tropical fish a threat to Mediterranean Sea ecosystems 2
... activated when we choose to suppress an emotion, compared to ... new study from the UCL Institute of Cognitive Neuroscience and ... Brain Structure and Function , the researchers scanned the brains ... activated when choosing for oneself to suppress an emotion. They ...
... among a national group of 87 newly elected fellows ... Tweten, OU Health Sciences Center in Oklahoma City, and ... highly-selective, peer-review process, based on their records of scientific ... Tweten, George Lynn Cross Research Professor in the Department ...
... that R. Graham Cooks, the Henry Bohn Hass Distinguished ... of the 2013 Dreyfus Prize in the Chemical Sciences, ... awarded biennially, consists of $250,000, a citation, and a ... University in the fall and will feature a lecture ...
Cached Biology News:Study finds brain system for emotional self-control 2OU microbiologists elected as fellows in the American Academy of Microbiology 2R. Graham Cooks wins Dreyfus Prize in the Chemical Sciences 2
(Date:9/18/2014)... at USC have developed a new microscopy technology ... living animals at higher-than-ever resolution. , Dubbed "Complementation ... imaging resolutions that are an order of magnitude ... into the behavior of biomolecules at the nanometer ... 18 by Nature Communications , the researchers ...
(Date:9/18/2014)... Silicon-valley Electronic Data Capture (EDC) provider ... the latest addition to Clinovo’s CRO Partnership Program. With ... Program, Clinovo further expands its global reach to Latin ... we are now able to build studies on our ... also rely on Clinovo to fully support the solution ...
(Date:9/18/2014)... Whitehouse Laboratories is pleased to announce ... and has acquired an additional 4,000 square feet of ... Complex adjacent to its current package testing facility. The ... 5th. Whitehouse Labs is in the process of upgrading ... package testing. The prime location enables Whitehouse Labs to ...
(Date:9/17/2014)... 2014 The global consumption of squalene / squalane ... a natural skin-identical chemical that finds applications in various end ... pharmaceuticals, and in other applications like high grade lubrication, and ... few major players and is regionally segregated. Sophim ( ... Co. Ltd. ( Japan ), SeaDragon Marine Oils ...
Breaking Biology Technology:Scientists pioneer microscopy technique that yields fresh data on muscular dystrophy 2Digitaliza TXT Joins Clinovo’s CRO Partnership Program, Bringing Its Open Source EDC System, ClinCapture to Latin America 2Digitaliza TXT Joins Clinovo’s CRO Partnership Program, Bringing Its Open Source EDC System, ClinCapture to Latin America 3Whitehouse Labs Announces Package Testing Laboratory Expansion 2Whitehouse Labs Announces Package Testing Laboratory Expansion 3Whitehouse Labs Announces Package Testing Laboratory Expansion 4Squalene Market by Source (Animal & Vegetable) & by End-user Industry (Cosmetics, Pharmaceuticals & Food Industry) - Global Trends & Forecasts to 2019 2Squalene Market by Source (Animal & Vegetable) & by End-user Industry (Cosmetics, Pharmaceuticals & Food Industry) - Global Trends & Forecasts to 2019 3
... of Physics World, Paul Blom and Ton van Mol ... of creating thin, flexible sheets of organic light-emitting diodes ... These bendable materials could oust the conventional light ... being used for everything from lighting tiles and strips ...
... 1, 2011 Netsmart Technologies, Inc., a leading ... services organizations nationwide, today announced an agreement with ... (LACDMH) for the provision of a comprehensive behavioral ... will be known as the Integrated Behavioral Health ...
... November 1, 2011 - Listed companies to present ... 30 - December 2 Elsevier Business Intelligence ... to Watch list. The list delivers projects and companies with ... growth through investments in deals. This year,s list includes ...
Cached Biology Technology:Researchers roll out a new form of lighting 2County of Los Angeles Selects Netsmart to Provide Comprehensive Behavioral Health Information System 2County of Los Angeles Selects Netsmart to Provide Comprehensive Behavioral Health Information System 3Windhover Announces the "Top Biopharma Projects to Watch" 2Windhover Announces the "Top Biopharma Projects to Watch" 3
... entry by collecting data from any RS232 ... Collect is extremely easy to use and ... entry. An excellent solution for collecting ... force gauges, digital calipers, bar code readers, ...
One unit is equal to 10Kb (insert DNA + vector). The final cost will increase or decrease according to the final assembled genome size. The price does not include genome annotation....
Nuclear/Cytosol Fractionation Kit Research Focus: other Storage Temperature: 4C Shipping Temperature: 4C...
Peptide-affinity Purified Polyclonal Antibody to MTR...
Biology Products: