海洋学报（中文版）
海洋學報（中文版）
해양학보（중문판）
ACTA OCEANOLOGICA SINICA
2014年
6期
25-32
,共8页
徐冠球%陆小兰%杨桂朋%赵保振
徐冠毬%陸小蘭%楊桂朋%趙保振
서관구%륙소란%양계붕%조보진
一氧化碳%分布%通量%微生物消耗%东海
一氧化碳%分佈%通量%微生物消耗%東海
일양화탄%분포%통량%미생물소모%동해
carbon monoxide%distribution%sea-to-air flux%microbial consumption%East China Sea
研究了夏季东海海水中和大气中一氧化碳(CO)的浓度分布、海-气通量和表层海水中CO的微生物消耗。夏季东海大气中CO的体积分数范围为63×10-9~120×10-9,平均值为87×10-9(SD=18×10-9,n=37),呈现出近岸高,远海低和北高南低的特点。夏季东海表层海水中CO的浓度范围为0.24~5.51 nmol/L,平均值为1.48 nmol/L(SD=1.46,n=37),CO的浓度受太阳辐射影响明显；CO在垂直分布上表现出浓度随深度增加迅速减小的特征,浓度最大值出现在表层。调查期间表层海水中CO相比大气处于过饱和状态,过饱和系数变化范围为3.65~113.55,平均值为23.63(SD=24.56, n=37),这表明调查海域是大气中CO的源。CO的海-气通量变化范围为0.25~78.50μmol/(m2· d),平均值为9.97μmol/(m2·d)(SD=14.92,n=37)。在CO的微生物消耗培养实验中,CO的浓度随时间增长呈指数降低,消耗过程表现出一级反应的特点,速率常数KCO范围为0.043~0.32/h,平均值为0.18/h(SD=0.088,n=9),KCO与盐度之间存在负相关关系。
研究瞭夏季東海海水中和大氣中一氧化碳(CO)的濃度分佈、海-氣通量和錶層海水中CO的微生物消耗。夏季東海大氣中CO的體積分數範圍為63×10-9~120×10-9,平均值為87×10-9(SD=18×10-9,n=37),呈現齣近岸高,遠海低和北高南低的特點。夏季東海錶層海水中CO的濃度範圍為0.24~5.51 nmol/L,平均值為1.48 nmol/L(SD=1.46,n=37),CO的濃度受太暘輻射影響明顯；CO在垂直分佈上錶現齣濃度隨深度增加迅速減小的特徵,濃度最大值齣現在錶層。調查期間錶層海水中CO相比大氣處于過飽和狀態,過飽和繫數變化範圍為3.65~113.55,平均值為23.63(SD=24.56, n=37),這錶明調查海域是大氣中CO的源。CO的海-氣通量變化範圍為0.25~78.50μmol/(m2· d),平均值為9.97μmol/(m2·d)(SD=14.92,n=37)。在CO的微生物消耗培養實驗中,CO的濃度隨時間增長呈指數降低,消耗過程錶現齣一級反應的特點,速率常數KCO範圍為0.043~0.32/h,平均值為0.18/h(SD=0.088,n=9),KCO與鹽度之間存在負相關關繫。
연구료하계동해해수중화대기중일양화탄(CO)적농도분포、해-기통량화표층해수중CO적미생물소모。하계동해대기중CO적체적분수범위위63×10-9~120×10-9,평균치위87×10-9(SD=18×10-9,n=37),정현출근안고,원해저화북고남저적특점。하계동해표층해수중CO적농도범위위0.24~5.51 nmol/L,평균치위1.48 nmol/L(SD=1.46,n=37),CO적농도수태양복사영향명현；CO재수직분포상표현출농도수심도증가신속감소적특정,농도최대치출현재표층。조사기간표층해수중CO상비대기처우과포화상태,과포화계수변화범위위3.65~113.55,평균치위23.63(SD=24.56, n=37),저표명조사해역시대기중CO적원。CO적해-기통량변화범위위0.25~78.50μmol/(m2· d),평균치위9.97μmol/(m2·d)(SD=14.92,n=37)。재CO적미생물소모배양실험중,CO적농도수시간증장정지수강저,소모과정표현출일급반응적특점,속솔상수KCO범위위0.043~0.32/h,평균치위0.18/h(SD=0.088,n=9),KCO여염도지간존재부상관관계。
Carbon monoxide (CO)concentration distribution,sea-to-air flux and microbial consumption rate con-stants,along with atmospheric CO mixing ratios,were measured in the East China Sea in summer.Atmospheric CO mixing ratios varied from 63×10-9 to 120×10-9 ,with an average of 87×10-9 (SD=18×10-9 ,n=37).Overall, the concentrations of atmospheric CO displayed a decreasing trend from the coastal stations to the offshore stations and a decreasing trend from the northern stations to the southern stations.The surface water CO concentrations in the investigated area ranged from 0.24 to 5.51 nmol/L,with an average of 1.48 nmol/L (SD=1.46,n=37).The surface water CO concentrations were affected significantly by sunlight.Vertical profiles showed that CO concen-trations declined with depth rapidly,with the maximum values appearing in the surface water.The surface CO con-centrations were oversaturated and the saturation factors ranged from 3.6 5 to 1 1 3.5 5 ,with an average of 2 3.6 3 (SD=24.56,n=37).The East China Sea was a net source of atmospheric CO.The sea-to-air fluxes of CO in the East China Sea ranged from 0.25 to 78.50μmol/(m2 ·d),with an average of 9.97μmol/(m2 ·d)(SD=14.92, n=3 7 ).In the incubation experiments,CO concentrations decreased exponentially with incubation time and the processes conformed to the first order reaction characteristics.The microbial CO consumption rate constants in the surface water (KCO)ranged from 0.043 to 0.32 h-1 ,with an average of 0.18 h-1 (SD=0.088,n=9).A negative correlation between KCO and salinity was observed in the present study.
