Sentences with phrase «in boreal»

In intervals in which the earth is farthest from the Sun in boreal summer, with low tilt, the «canonical» C - M hypothesis would say there's more chance of high - latitude Northern Hemisphere snow cover persisting through summer.

It is one of the most common breeding species in the boreal forest, and flies nonstop from the East Coast of North America to South America, where it spends the winter.

In earlier studies, planting trees in the boreal forest regions (found mostly in the upper half of the Northern Hemisphere) caused a warming of surface temperatures.

Arctic sea - ice cover will diminish rapidly under global warming, but its rate of retreat in boreal winter shows large intermodel differences across the models involved in Phase 5 of the Coupled Model Intercomparison Project...

Warming is especially pronounced in high northern - latitude regions in the boreal winter and in southern Europe and parts of central and northern Asia in the boreal summer.

The exception is the higher latitudes, where land areas warm relatively faster in boreal summer in high - end models, but sea ice areas show varying differences in boreal winter.

Quasi-resonant circulation regimes and hemispheric synchronization of extreme weather in boreal summer

Many continental interiors warm approximately twice as fast as the global average, with this being particularly accentuated in boreal summer, and the winter - time Arctic Ocean temperatures rise more than three times faster than the global average.

Although the melting of underlying permafrost will release huge amounts of the greenhouse gases blamed for fueling global warming, researchers who sampled three sites in boreal Alberta, Saskatchewan and Manitoba have discovered that the warmer, softer, wetter soil that results also promotes the growth of new mosses that capture and store about as much carbon from the atmosphere as the thawed ground releases.

There are also large soil carbon stocks in boreal systems — to the extent that boreal soil carbon flux is linked with land use / land cover, that's another important wrinkle to the boreal forest climate story.

Pine Grosbeak (Pinicola enucleator) are found in the Boreal forests of North American and Eurasia, according to All About Birds.

Consequently, rapid industrial development in the Northern Hemisphere may have caused the significant two-fold rise in boreal GEM atmospheric levels reported after World War II.

The authors use climate, lightning, fire and vegetation data to assess the mechanisms contributing to large fire years and find an increase in lightening ignitions, which drives interannual and long - term ignition and burned area dynamics in boreal North America.

On a decadal scale, the relative contribution of the fluxes to the total global flux is stable in several regions, like Australia or tropical Asia, but increasing land sinks are noticed in Boreal and Temperate Eurasia and in Tropical South America.

The increased mid-Holocene solar heating in boreal summer leads to more warming in the western than in the eastern Pacific, which strengthens the trade winds and inhibits the development of ENSO (Clement et al., 2000, 2004).

FMI implements method that improves current understanding of air chemistry in boreal forests, which will help to improve predictions of global climate models in the future.

With the instrument long - term studies in the boreal forest will be conducted to investigate in detail what are the unknown chemical compounds in the air of boreal forests and what are their origins.

B.S.P.) in boreal Quebec, Canada

This stately swan breeds in the boreal ponds of the far north, wintering on both coasts.

Rangwala I., E. Sinsky and J. R. Miller (April 2016): Variability in projected elevation dependent warming in boreal midlatitude winter in CMIP5 climate models and its potential drivers.

During terminations II and IV (Fig. 2), greater increases in boreal summer insolation driving faster ice retreat and attendant continuous reduction in AMOC strength can explain the lack of Younger Dryas — like events in these cases (e.g., Ruddiman et al., 1980; Carlson, 2008).

Climatic shifts would be expected to exacerbate the large - scale ecosystem changes in boreal regions that human induced changes from grazing or fires can also trigger (e.g., Chapin et al., 2004, Randerson et al., 2006).

O'Donnell JA, Aiken GR, Walvoord MA, Raymond PA, Butler KD, Dornblaser MM, Heckman K (2014) Using dissolved organic matter age and composition to detect permafrost thaw in boreal watersheds of interior Alaska.

O'Donnell JA, Aiken GR, Butler KD, Guillemette F, Podgorski DC, Spencer RGM (2016a) DOM composition and transformation in boreal forest soils: The effects of temperature and organic - horizon decomposition state.

Under those conditions, the spread of fires in the boreal forests of Eurasia would greatly increase once such a fire is started.23 If global warming continues at its current pace, the annual fire season in these boreal forests are likely to start earlier and end later, and become more severe.5, 7,6,15

Finger RA, Turetsky MR, Kielland K, Ruess RW, Mack MC, Euskirchen ES (2016) Effects of permafrost thaw on nitrogen availability and plant - soil interactions in a boreal Alaskan lowland.

(10/31/2007) Forest fires in the boreal forests of Canada are an important source of greenhouse gas emissions reports a new study published in the journal Nature.

Similar mega-fires are expected to increase in the boreal forest, where some areas have gone thousands of years without burning.

Cold temperatures prevent the complete breakdown of dead biomass in the boreal, so that carbon is accumulated over time, sometimes even millennia.

Kasischke, E.S., Boreal ecosystems in the global carbon cycle, pp. 19 - 30 in Fire, Climate Change and Carbon Cycling in the Boreal Forest, Kasischke, E.S., and B.J. Stocks (editors), Ecological Studies Series, Springer - Verlag, New York, 2000.

Logging, mining, and purposely set fires are the leading causes for destruction in the boreal.

The trees in these plots, which cover a wide geographic region spanning 32 ° of longitude and 10 ° of latitude primarily in the boreal zone, were censused over a period from 1958 to 2009 (Fig. 1).

In fact, new studies have found that the amount of carbon locked away in the boreal forest may be 2 - 3 times even current estimations.

Wildland fire is the dominant ecological disturbance in boreal forests and also affects tundra environments.

D. Wunch et al The covariation of Northern Hemisphere summertime CO2 with surface temperature in boreal regions http://www.atmos-chem-phys.net/13/9447/2013/acp-13-9447-2013.pdf

Massive fires have created headlines and caused widespread damage from Siberia to Alaska to the Northwest Territories to Alberta recently, all part of a trend of increased fire activity unheard of in the boreal forest over the past 10,000 years.

Using boulder 10Be surface exposure ages, we date initial southern Laurentide ice - sheet (LIS) retreat from LGM moraines in Wisconsin (USA) to 23.0 ± 0.6 ka, coincident with retreat elsewhere along the southern LIS and synchronous with the initial rise in boreal summer insolation 24 — 23 ka.

Gower and colleagues used the Biome - BGC process model to simulate what is happening in the Boreal Ecosystem - Atmosphere Study (BOREAS) region, which at 1000 km × 1000 km makes up 15 — 20 % of the North American boreal forest.

His work on this topic has included over a decade of research in boreal and arctic Alaska and northeastern Siberia.

Fluxes of methane, carbon dioxide and nitrous oxide in boreal lakes and potential anthropogenic effects on the aquatic greenhouse gas emissions

In Spring to Autumn Weather Extremes, we investigate, within the framework of QRA, severe regional weather extremes that occurred in boreal spring - to - autumn 2012 and 2013 in the NH.

For example, mechanisms evaluated in this work revealed a cooling trend in Eurasia due to forest loss in western North America; this finding, however, contrasts with evidence of a warming trend in the Northern Hemisphere high latitudes with increased CO2 concentrations [45] that result in shifts in boreal forest range and disturbance regime [46].

Our study shows that, in boreal spring - to - autumn 2012 and 2013, a majority of the weather extremes in the Northern Hemisphere midlatitudes were accompanied by highly magnified planetary waves with zonal wave numbers m = 6, 7, and 8.

The scientists calculate that there are 1.39 trillion trees growing in tropical and sub-tropical forests, about 0.61 trillion in temperate regions such as the US and Europe and 0.74 trillion in the boreal forests in the higher, more northerly latitudes of Canada and Siberia.

In boreal spring - to - autumn (May - to - September) 2012 and 2013, the Northern Hemisphere (NH) has experienced a large number of severe midlatitude regional weather extremes.

Cohen and co-workers set out their hypothesis as to what might be causing this flat trend in boreal DJF temperatures in a separate study, also published this year, entitled Arctic warming, increasing snow cover and widespread boreal winter cooling:

Hence, the most recent lapse in global warming is a seasonal phenomenon, prevalent only in boreal winter.

Loggers on the Ottawa River or in the British Columbia wilderness, western settlers living off of and clearing prairie land to prepare it for farming, gold prospectors in the Klondike, oil sands pioneers punching holes in the boreal forest — all of them became intimate with Canadian nature even as they transformed it from ecology to commodity.

While the article still does not recognize that land conversion, particularly in the low latitudes but also in the boreal forest regions continues and, therefore, will add further to how humans are altering the climate, it is an important step for the IPCC to finally make.

The model shows a major decrease in available area in boreal forest of west - central Canada, currently the heart of the species» breeding range; a lack of nesting sites may make it challenging for the Bufflehead to move into new areas farther north.