Wet and dry deposition of nitrogen c ompounds in the southeast Pacific coast: Montemar, central Chile

Abstract

A tmosphericco ncentratioinn them arineb oundarlya yera ndd irectd epositiomn easurements of totaln itratea nda mmoniumfo r an easternS outhP acificc oastasl iten earV alparaisoC, hile,w ere carriedo utd uringt hep eriodJ anuary1 992t hroughM arch 1993.C oncentrationins a ir for bothn itrogen formse xhibita seasonapla tternw ith low valuesin summera nda pronounceidn creasein winter, havinga meana nnuacl oncentratioonf 32.6 nmolm ' 3f or totaln itratea ndo f 44.8 nmolm ' 3f ort otal ammoniumW. et depositioins characterizebdy annuapl recipitatiown eightedc oncentrationosf 6 .0 and 8.1 gmold m' • forn itratea nda mmoniumr,e spectivelTyh. e mainf actorr egulatingw etd epositiofno r bothn itratea nda mmoniumis rainfalla mounts, ot hatc hangeisn precipitatioanm ounat loneo riginated by climatologicfaalc torsc anp roducec hangeisn theirr elatived epositiolne velsE. xistingc limatological patternd etermineasn overaldl ominancoef dryo verw etd epositionw,i tht otalso f 12.9a nd7 .34m mol 2 m' pery ear,t her educedfo rmso f nitrogenb eingg enerallym orea bundant.