Sentences with phrase «seasonal variation during»

By carefully micro-sampling each shell along its direction of growth and analyzing for stable carbon and oxygen isotopes and trace elements, the team reconstructed a record of seasonal variation during the lifetimes of the organisms.

«So, we decided to go back and look at emergency department visits for that time period and see if there were more visits here at certain seasonal variations during the year.»

If one looks at the ocean / water temperatures http://weather.unisys.com/surface/sst.html there are enormous differences between the tropics, temperate and north, and enormous seasonal variations during the year which will affect CO2 absorption and emission, and there is a lot of biological activity in seas and waters that also are involved.

Not exact matches

But the rate, not adjusted for seasonal variations, was up from 5.1 percent in May and June and 4.8 percent in April, although the rise during summer has also occurred in previous years.

In some cases, the foliage loss coincides with winter in temperate or polar climates, while others lose their leaves during the dry season in climates with seasonal variation in rainfall.

Observations of atmospheric carbon dioxide made by aircraft at altitudes between 3 and 6 kilometers (10,000 - 20,000 feet) show that seasonal carbon dioxide variations have substantially changed during the last 50 years.

«Specifically, we developed a model to predict seasonal variations of respiratory mortality rates in terms of monthly changes in air pollution levels and several other factors such as smoking during an almost 20 - year period.»

Therefore, the total annual and global mean radiative forcing during the LGM is likely to have been approximately — 8 W m — 2 relative to 1750, with large seasonal and geographical variations and significant uncertainties (see Section 6.4.1).

For example, data may fluctuate depending on cell type, timing of data collection (during the cell cycle, or diurnal, seasonal, or annual variations), developmental stage, and various external conditions.

The level of acne was observed to be far higher in winter: «seasonal variations were observed in acne as the condition exacerbates in winter, while if often improves during the summer months».

This phenomenon in seasonal variation is reflected in the maritime disaster events recorded for coastal regions of southeastern China and landfall locations of tropical cyclones during the Qing Dynasty.

These data, collected as part of Ken Taylor's own laboratory research, yield insights into slight variations in the acidity of the ice that result from seasonal differences in sea salt and dust captured during winter and summer snowstorms.

Therefore, the total annual and global mean radiative forcing during the LGM is likely to have been approximately — 8 W m — 2 relative to 1750, with large seasonal and geographical variations and significant uncertainties (see Section 6.4.1).

In addition to finding seasonal and geographic variations in the urban heat island effect, Wang et al also found a substantial decrease in the urban effect during the periods of the «Great Leap Forward» (1958 - 61) and the «Cultural Revolution» (1966 - 71) and an increasing trend in the urban effect afterwards.

However, (a) the anthropogenic emission is less than a third of the seasonal variation, and (b) the rapid changes to atmospheric CO2 concentration of the seasonal variation indicate that during each year the system very rapidly adjusts to seasonal changes that are much greater than the anthropogenic emission each year (in some places more than an order of magnitude greater; e.g. at Alert, Canada).