Weekly and daily precipitation chemistry network comparisons in the eastern U.S. NADP/NTN vs MAP3S/AIRMoN

Bütler, Thomas; Likens, Gene E.

doi:10.1016/s1352-2310(98)00097-1

Cited by 38 publications

(18 citation statements)

References 11 publications

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“…Presuming these losses are primarily due to volatization it is likely that the NH + 4 losses will be lower in MMSF due to the relatively low WD pH. However, it is also worthy of note that the uncertainty is comparable to values reported for coincident samples collected from identical colocated samplers in the NADP network (Nilles et al, 1994), and Butler and Likens (1998) also reported lower concentrations of NH + 4 in weekly samples relative to daily or event based sampling which they attributed to biological processes. Hence, it remains likely that the NH + 4 concentrations (and fluxes) from the Aerochem collected samples may underestimate actual concentrations.…”

mentioning

confidence: 84%

Liquid and Chemical Fluxes in Precipitation, Throughfall and Stemflow: Observations from a Deciduous Forest and a Red Pine Plantation in the Midwestern U.S.A.

Pryor

Barthelmie

2005

Water Air Soil Pollut

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Wet deposition (WD), throughfall (TF) and stemflow (SF) measurements undertaken in a deciduous forest show 85% of the WD liquid flux is observed as TF and approximately 2% as SF. TF and SF were observed to be enriched in base cations and accordingly had an average pH of 6.1 and 5.9, respectively relative to a WD pH of 5.1. The seasonal variability of TF pH below the deciduous canopies was more pronounced than that of WD though both exhibited a growing season maximum, and there is evidence that the seasonal variability of TF pH below the pines is inverted relative to the deciduous canopies likely due to enhanced dust capture and buffering by calcium carbonate. TF ion concentrations differed significantly between deciduous and pine canopies during the growing season, and there is some evidence that variation in sky view factor of 0.18-0.22 is sufficient to manifest statistically differing TF composition below sugar maples. The total atmospheric flux of inorganic nitrogen to the forest is approximately 14-18 kg-N ha −1 yr −1 with approximately half taken up by the canopy. Associated experiments designed to quantify uncertainties in the nutrient fluxes included laboratory tests of the Aerochem automated wet-dry sampler. These experiments indicate the delay in initiating sample collection is less than half a minute for rainfall rates above 1 cm h −1 , but may increase substantially for lower precipitation rates.

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mentioning

confidence: 84%

Liquid and Chemical Fluxes in Precipitation, Throughfall and Stemflow: Observations from a Deciduous Forest and a Red Pine Plantation in the Midwestern U.S.A.

Pryor

Barthelmie

2005

Water Air Soil Pollut

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“…Butler and Likens (1998) [38] found that daily samples may provide a better estimate of actual rain chemistry than weekly samples. Gilliland et al (2002) [39] .…”

Section: Sample Collectionmentioning

confidence: 99%

Chemical Composition of Water Soluble Inorganic Species in Precipitation at Shihwa Basin, Korea

et al. 2015

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“…It has been suggested that lighter falls rich in acidic substances are diluted by any other fall which may occur during the week and thus lead to higher pH values in weekly precipitation samples than event-based samples (Sisterson et al 1985;Tait and Thaler 2000). On the other hand, the continued conversion of dissolved SO 2 to SO 4 2-has been suggested to increase acidity in weekly samples (Bulter and Likens 1998). Thus, the effect of different sampling frequencies on precipitation chemistry is unclear and cannot be used with confidence to explain the decrease in the pH of our weekly precipitation samples.…”

Section: Precipitation Chemistrymentioning

confidence: 99%

Precipitation chemistry at a high elevation forest in central Taiwan

Ding

Lin

Chan

et al. 2011

Journal of Forest Research

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High elevation ecosystems are particularly sensitive to environmental change. Mountain agriculture is extending to areas at high elevations in Taiwan but the effects on nutrient cycling of the surrounding ecosystems are largely unknown. We examined precipitation chemistry at Piluchi Experimental Forest in central Taiwan to evaluate the contributions of local air pollution and long-range transport of air pollutants on nutrient cycling at this seemingly remote forest. Sea-salt aerosols and anthropogenic pollutants resulting from long-range transport of air pollutants and mountain agriculture activities are the key factors affecting precipitation chemistry at Piluchi Experimental Forest. Precipitation chemistry was dominated by ions of oceanic origin in the summer and by anthropogenic pollutants SO 4 2-, NO 3 -and NH 4 ? in the winter and spring, the northeast monsoon season. The much higher concentrations of S and N in the northeast monsoon season than the summer suggest a substantial contribution from long-range transport as the prevailing air masses moved from inland China and passed over the industrialized east coast of China before arriving in Taiwan. The very high concentration of NH 4 ? (22 leq L -1 ) in the spring, when the local application of N-containing fertilizers was high, signifies the influences of mountain agriculture. Despite very low concentrations relative to other sites in Taiwan, annual input of NH 4 ? (3.6 kg ha -1 year -1 ), NO 3 -(7.2 kg ha -1 year -1 ) and SO 4 2-(10 kg ha -1 year -1 ) via precipitation was substantial suggesting that high elevation ecosystems of Taiwan are not free from the threat of atmospheric deposition of pollutants.

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Weekly and daily precipitation chemistry network comparisons in the eastern U.S. NADP/NTN vs MAP3S/AIRMoN

Cited by 38 publications

References 11 publications

Liquid and Chemical Fluxes in Precipitation, Throughfall and Stemflow: Observations from a Deciduous Forest and a Red Pine Plantation in the Midwestern U.S.A.

Liquid and Chemical Fluxes in Precipitation, Throughfall and Stemflow: Observations from a Deciduous Forest and a Red Pine Plantation in the Midwestern U.S.A.

Chemical Composition of Water Soluble Inorganic Species in Precipitation at Shihwa Basin, Korea

Precipitation chemistry at a high elevation forest in central Taiwan

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