Atmospheric nitrogen deposition in the northern Chihuahuan desert: Temporal trends and potential consequences

Effects of simulated storm sizes and nitrogen on three Chihuahuan Desert perennial herbs and a grass

Establishment and growth of three perennial herbs and a small tussock grass were studied in an experiment that provided simulated rainfall of 6 mm week 1 or 25 mm once per month and nitrogen fertilization in combination with the different simulated rainfall regimes. Wild onion, Allium macropetalum, failed to establish in plots receiving 25 mm month 1 simulated rainfall. The perennial composite,...

Inferences about winter temperatures and summer rains from the late Quaternary record of C4 perennial grasses and C3 desert shrubs in the northern Chihuahuan Desert

Late Quaternary histories of two North American desert biomesC4 grasslands and C3 shrublandsare poorly known despite their sensitivity and potential value in reconstructing summer rains and winter temperatures. Plant macrofossil assemblages from packrat midden series in the northern Chihuahuan Desert show that C4 grasses and annuals typical of desert grassland persisted near their present north...

Wet and dry deposition of atmospheric nitrogen at ten sites in Northern China

Emissions of reactive nitrogen (N) species can affect surrounding ecosystems via atmospheric deposition. However, few long-term and multi-site measurements have focused on both the wet and the dry deposition of individual N species in large areas of Northern China. Thus, the magnitude of atmospheric deposition of various N species in Northern China remains uncertain. In this study, the wet and ...

Effects of atmospheric dust deposition on leaf chlorophyll fluorescence parameters of cow-tail shrubs (Smirnovia iranica) in the desert regions of Kashan, Iran

FINNISH METEOROLOGICAL INSTITUTE CONTRIBUTIONS No. 44 TEMPORAL AND REGIONAL PATTERNS OF ATMOSPHERIC COMPONENTS AFFECTING ACIDIFICATION IN FINLAND

Acid deposition is caused by the anthropogenic and natural emissions of sulphur dioxide and nitrogen oxides. The main sources of the anthropogenic emissions are fossil fuel consumption and industrial processes. In this study, the atmospheric compounds affecting the acidification in Finland have been investigated from different viewpoints. The geographical distribution, temporal trends and episo...