Sentences with phrase «with peak concentrations»

The study showed clear seasonal cycles at both locations — with peak concentrations at Cayenne from January to May and from May to September at Guadeloupe.

Not exact matches

In the Grades, each day begins with a two - hour period devoted to a single academic subject (when the children's concentration is at its peak).

Data from the new ice core array illustrates that Antarctic lead concentrations reached a peak in 1900 and remained high until the late 1920s, with brief declines during the Great Depression and the end of World War II.

They found that women with higher concentrations of BPA had lower peaks of estradiol, a form of estrogen important in the development of eggs in the ovaries.

To achieve 450 ppm, the concentration of greenhouse gases in the atmosphere associated with a 2 - degree Celsius rise in global average temperatures (a target advocated by the European Union), the «aggregate of fossil - fuel demand will peak out in 2020,» Tanaka says.

«Our measurements show that traffic - related pollutant concentrations peak near intersections and decrease sharply with distance,» Paulson said.

With 18 different scenarios tested, the team calculated a range of peak formation of secondary organic aerosols when typical concentrations of limonene were introduced to ozone - rich environments with a range of air exchange raWith 18 different scenarios tested, the team calculated a range of peak formation of secondary organic aerosols when typical concentrations of limonene were introduced to ozone - rich environments with a range of air exchange rawith a range of air exchange rates.

The researchers found that due to the confined cabin space, with the worst ventilation conditions, as well as in peak contamination, that the evidence indicates that smoking in cars produces fine particle pollution concentrations which are very rarely found in studies on air quality.

The NEFA concentration rapidly decreased after the breakfast meal and then gradually increased throughout the day, with a sharp peak occurring after the dinner meal.

The isocaloric high - protein diet led to no significant change in nadir plasma concentrations, peak plasma concentrations, or AUC values for the 24 - h leptin profiles obtained during CRC2 compared with those obtained during visit CRC1.

The plasma drug concentration increases with the extent of absorption; the peak is reached when the drug elimination rate equals absorption rate.

It increases during fasting and usually peaks in concentration before an anticipated meal, paired with increased feelings of hunger, and decreases after feeding.

The results from this trial clearly indicate that the replacement of refined carbohydrates with EPRO and UFA increased insulin sensitivity, LDL peak particle size, and lowered fasting TG and VLDL cholesterol concentrations in men and women with an elevated TG concentrations.

Peak blood concentrations of cannabinoids occur about 3 - 8 minutes after you inhale, as opposed to 60 - 90 minutes after you eat a weed - or oil - containing edible, with neural effects beginning after 20 minutes and maximizing within a range of 2 - 4 hours.

Anovulation was defined as any cycle with a peak progesterone concentration ≤ 5 ng / mL and no observed serum LH peak at the mid — or late — luteal phase visits.

I certainly found equity issues for schools serving high concentrations of both low income and EL kids during my limited school visits during the peak of the field testing window several weeks ago, and the L A Times article also documented concerns with equity issues.

Nestled in a scenic box canyon and surrounded by the highest concentration of 14,000 - foot peaks in North America, Telluride combines breathtaking views and world - renowned terrain with an easy - going lifestyle.

A band with optical thickess per unit gas decaying exponentially away from a peak: Assuming the peak is saturated at some level within the atmopshere and there are no other absorbers in the same band of wavelengths above that level, increasing the concentration of that gas will result in at least an instantaneous cooling forcing of the layer above (not necessarily all of the layer, but the instantaneous forcing on the layer as a whole will be negative).

The shape of the CO2 absorption band, in terms of CSD per unit CO2 concentration, can be approximated as having a peak at some frequency (designated ν0) or wavelength (about 15 microns for CO2) with, on each side of that peak, a halving of that optical thickness for each amount BW1 or BW2 that one moves away from the center (toward lower or higher frequency, respectively)

With a lifetime of ~ 10 years, spreading emissions over 30 - year period would of course reduce the peak atmospheric burden (though CH4 lifetime would presumably increase with higher CH4 concentratiWith a lifetime of ~ 10 years, spreading emissions over 30 - year period would of course reduce the peak atmospheric burden (though CH4 lifetime would presumably increase with higher CH4 concentratiwith higher CH4 concentration).

Taking account of their historic responsibility, as well as the need to secure climate justice for the world's poorest and most vulnerable communities, developed countries must commit to legally binding and ambitious emission reduction targets consistent with limiting global average surface warming to well below 1.5 degrees Celsius above preindustrial levels and long - term stabilization of atmospheric greenhouse gas concentrations at well below below 350 p.p.m., and that to achieve this the agreement at COP15 U.N.F.C.C.C. should include a goal of peaking global emissions by 2015 with a sharp decline thereafter towards a global reduction of 85 percent by 2050,

Most interesting is that the about monthly variations correlate with the lunar phases (peak on full moon) The Helsinki Background measurements 1935 The first background measurements in history; sampling data in vertical profile every 50 - 100m up to 1,5 km; 364 ppm underthe clouds and above Haldane measurements at the Scottish coast 370 ppmCO2 in winds from the sea; 355 ppm in air from the land Wattenberg measurements in the southern Atlantic ocean 1925-1927 310 sampling stations along the latitudes of the southern Atlantic oceans and parts of the northern; measuring all oceanographic data and CO2 in air over the sea; high ocean outgassing crossing the warm water currents north (> ~ 360 ppm) Buchs measurements in the northern Atlantic ocean 1932 - 1936 sampling CO2 over sea surface in northern Atlantic Ocean up to the polar circle (Greenland, Iceland, Spitsbergen, Barents Sea); measuring also high CO2 near Spitsbergen (Spitsbergen current, North Cape current) 364 ppm and CO2 over sea crossing the Atlantic from Kopenhagen to Newyork and back (Brements on a swedish island Lundegards CO2 sampling on swedish island (Kattegatt) in summer from 1920 - 1926; rising CO2 concentration (+7 ppm) in the 20s; ~ 328 ppm yearly average

Agricultural activities also contribute significantly to the total DMS emitted, with up to about a third of the total DMS peak maximum concentration observed from this source localized around the Chino / Riverside area.

Based on these 591 species, we project present - day endemic diversity to peak at 340 species per km2, with the highest concentrations from southern Northwest California through most of Central Western California and in the foothills of the Sierra Nevada (Fig. 1B).

As forcing is a function of atmospheric concentrations, the case with no emissions floor and higher CO2 concentrations will result in a higher peak temperature.

This region reflects radio waves with frequencies up to about 35 megahertz; the exact value depends on the peak amount of the electron concentration, typically 106 electrons per cubic centimetre, though with large variations caused by the sunspot cycle.

These range from the low - end, where atmospheric CO2 concentration peaks and then falls during this century (RCP2.6), to the high - end, with no action to reduce global emissions (RCP8.5).

Consider, for example, that Lowe, et al. [in Avoiding Dangerous Climate Change, H.J. Schellnhuber et al. (eds), Cambridge University Press, Cambridge, 2006, p. 32 - 33], based on a «pessimistic, but plausible, scenario in which atmospheric carbon dioxide concentrations were stabilised at four times pre-industrial levels,» estimated that a collapse of the Greenland Ice Sheet would over the next 1,000 years raise sea level by 2.3 meters (with a peak rate of 0.5 mm / yr).

Peak ozone is an episodic problem with the highest concentrations observed during high energy demand periods.