With both dissolved and particulate barium ’ s links with silicic acid and POC , it can be used to determine historical variations in the biological pump , carbon cycle , and global climate .
ADP DET VERB CCONJ NOUN NOUN ’ NOUN NOUN ADP NOUN NOUN CCONJ PROPN , PRON AUX AUX VERB PART VERB ADJ NOUN ADP DET ADJ NOUN , NOUN NOUN , CCONJ ADJ NOUN .