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Photochemical production of low-molecular-weight carbonyl compounds in seawater and surface microlayer and their air-sea exchange
Abstract Coastal and oceanic surface microlayer samples were collected using a stainless steel screen, along with subsurface bulk seawater, and were analyzed for low-molecular-weight (LMW) carbonylExpand
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Photochemical degradation of dissolved organic carbon and its impact on the oceanic carbon cycle
THE processes that regulate the cycling of oceanic dissolved organic carbon (DOC), one of the largest carbon reservoirs on the Earth's surface1, are largely unknown. DOC residues in the deep sea,Expand
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Apparent partition coefficients of 15 carbonyl compounds between air and seawater and between air and freshwater ; implications for air-sea exchange
Apparent partition coefficients (K*, in M/atm) of 15 carbonyl compounds between water and air were determined as a function of temperature, salinity, and pH, using a bubble column technique. ValuesExpand
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Formation of carbonyl compounds from UV‐induced photodegradation of humic substances in natural waters: Fate of riverine carbon in the sea
Low-molecular-weight (LMW) carbonyl compounds, e.g. formaldehyde, acetaldehyde, and the a-keto acid glyoxylate, were produced in a wide variety of natural waters upon irradiation with sunlight.Expand
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Snowpack photochemical production of HONO: A major source of OH in the Arctic boundary layer in springtime
Both snow manipulation experiments and ambient measurements during the Polar Sunrise Experiment 2000 at Alert (Alert2000) indicate intensive photochemical production of nitrous acid (HONO) in theExpand
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Nitric acid photolysis on surfaces in low‐NOx environments: Significant atmospheric implications
[1] Nitric acid (HNO3) is the dominant end product of NOx (= NO + NO2) oxidation in the troposphere, and its dry deposition is considered to be a major removal pathway for the atmospheric reactiveExpand
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Determination of photochemically produced hydroxyl radicals in seawater and freshwater
A variety of short-lived, reactive chemical species (i.e. free radicals and excited state species) are known to be photochemically produced in natural waters. Some of these transients may stronglyExpand
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Nitric acid photolysis on forest canopy surface as a source for tropospheric nitrous acid
Photolysis of nitrous acid generates hydroxyl radicals — a key atmospheric oxidant. Measurements at a forest in Michigan suggest that sunlight-induced breakdown of nitric acid on the canopy surfaceExpand
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Summertime nitrous acid chemistry in the atmospheric boundary layer at a rural site in New York State
[1] Ambient measurements of HONO and HNO3, using a highly sensitive coil scrubbing/HPLC/visible detection technique, were made at a rural site in southwestern New York State from 26 June to 14 JulyExpand
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Chemical and physical characteristics of nascent aerosols produced by bursting bubbles at a model air-sea interface
inorganic aerosol constituents were similar to those in ambient air. Ca 2+ was significantly enriched relative to seawater (median factor = 1.2). If in the form of CaCO3, these enrichments would haveExpand
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