Nitrogen cycle human activities, effect

The combined effects of warming air temperatures and of enhanced stratihcation in the upper ocean may thus promote the dissolution of iron in dust and its subsequent bio-availabtiity in the surface seawaters, possibly enhancing nitrogen fixation and export production. Future aeohan Fe input to the ocean may increase due to desertihcation enhanced by human activities or decrease by altered hydro-logical cycles (Fig. 35.5). These interactions and feedbacks could certainly play important roles in future nutrient and carbon cycles in the ocean. 

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