Nitrogen fixation rate in the North Pacific Ocean

Hourly rates multiplied to 12 hours. Assuming 3:1 for C2H2 reduction:N2 assimilation. Nitrate includes total concentration of nitrate + nitrite + ammonium + urea.将小时速率乘以12小时进行折算。假定乙炔还原（C2H2 reduction）与氮同化（N2 assimilation）的比例为3:1。本统计项下的硝酸盐浓度涵盖硝酸盐、亚硝酸盐、铵态氮及尿素的总浓度。