A method for determining net quantity of sequestered atmospheric carbon through ocean iron fertilization comprising the steps of: a) defining a project boundary; b) obtaining baseline measurements, metrics and observations within and beyond the project boundary; wherein the baseline measurements, metrics and observations are: - chlorophyll concentration (chl), - photosynthetic active radiation (par), - surface sea temperature (sst), - day length, - particulate Organic Carbon, - dissolved Organic Carbon, - euphotic zone Organic carbon (CorgE), and - Organic carbon close to deep Thermocline (CorgT); c) applying an iron compound within the project boundary to enhance photosynthesis; d) obtaining certain measurements, metrics and observations within and adjacent to the project boundary after the introduction of the iron compound to create a time-series that defines the area of the project boundary on a daily basis from introduction of the iron compound until project conclusion; e) by using the measurements obtained from steps b) and d), determining total daily carbon sequestration within the actual project boundary, Cseq, wherein said Cseq = CorgEff ∗ NPP; f) determining a total daily carbon sequestration outside the project boundary, Cseq, wherein said Cseq = CorgEff ∗ NPP; g) determining total daily net carbon sequestration, Cseq, wherein said Cseq = Cseq -Cseq; and h) obtaining the total net carbon sequestration of the project boundary (Ctotal) as the sum of the daily Cseq from the introduction of the iron compound until project conclusion; and wherein, - Corg = POC + DOC; - CorgEff = CorgT/CorgE; and - NPP is the Net Primary Production defined as: NPP = chl ∗ pb _ opt ∗ day length ∗ 0.66125 ∗ par par + 4.1 ∗ z _ eu; wherein - pb_obt is the photosynthetic activity a function of the sea surface temperature (sst): pb _ opt = 1.54 ∗ 10 0.0275 ∗ sst − 0.07; and - z_eu is the euphotic depth at which 1% of the surface/incident light is available, wherein: where z_eu = 200 ∗ (chl_tot) -0.293 if chl < 1, chl_tot = 38 ∗ chl 0.425 if chl >= 1, chl_tot = 40.2 ∗ chl 0.507 and if z_eu <= 102, then z_eu = 568.2 ∗ (chl_tot) -0.746. a) defining a project boundary; b) obtaining baseline measurements, metrics and observations within and beyond the project boundary; wherein the baseline measurements, metrics and observations are: - chlorophyll concentration (chl), - photosynthetic active radiation (par), - surface sea temperature (sst), - day length, - particulate Organic Carbon, - dissolved Organic Carbon, - euphotic zone Organic carbon (CorgE), and - Organic carbon close to deep Thermocline (CorgT); - chlorophyll concentration (chl), - photosynthetic active radiation (par), - surface sea temperature (sst), - day length, - particulate Organic Carbon, - dissolved Organic Carbon, - euphotic zone Organic carbon (CorgE), and - Organic carbon close to deep Thermocline (CorgT); c) applying an iron compound within the project boundary to enhance photosynthesis; d) obtaining certain measurements, metrics and observations within and adjacent to the project boundary after the introduction of the iron compound to create a time-series that defines the area of the project boundary on a daily basis from introduction of the iron compound until project conclusion; e) by using the measurements obtained from steps b) and d), determining total daily carbon sequestration within the actual project boundary, Cseq, wherein said Cseq = CorgEff ∗ NPP; f) determining a total daily carbon sequestration outside the project boundary, Cseq, wherein said Cseq = CorgEff ∗ NPP; g) determining total daily net carbon sequestration, Cseq, wherein said Cseq = Cseq -Cseq; and h) obtaining the total net carbon sequestration of the project boundary (Ctotal) as the sum of the daily Cseq from the introduction of the iron compound until project conclusion; and wherein, - Corg = POC + DOC; - CorgEff = CorgT/CorgE; and - NPP is the Net Primary Production defined as: NPP = chl ∗ pb _ opt ∗ day length ∗ 0.66125 ∗ par par + 4.1 ∗ z _ eu; wherein - pb_obt is the photosynthetic activity a function of the sea surface temperature (sst): pb _ opt = 1.54 ∗ 10 0.0275 ∗ sst − 0.07; and - z_eu is the euphotic depth at which 1% of the surface/incident light is available, wherein: where z_eu = 200 ∗ (chl_tot) -0.293 if chl < 1, chl_tot = 38 ∗ chl 0.425 if chl >= 1, chl_tot = 40.2 ∗ chl 0.507 and if z_eu <= 102, then z_eu = 568.2 ∗ (chl_tot) -0.746. - Corg = POC + DOC; - CorgEff = CorgT/CorgE; and - NPP is the Net Primary Production defined as: NPP = chl ∗ pb _ opt ∗ day length ∗ 0.66125 ∗ par par + 4.1 ∗ z _ eu; wherein - pb_obt is the photosynthetic activity a function of the sea surface temperature (sst): pb _ opt = 1.54 ∗ 10 0.0275 ∗ sst − 0.07; and - z_eu is the euphotic depth at which 1% of the surface/incident light is available, wherein: where z_eu = 200 ∗ (chl_tot) -0.293 if chl < 1, chl_tot = 38 ∗ chl 0.425 if chl >= 1, chl_tot = 40.2 ∗ chl 0.507 and if z_eu <= 102, then z_eu = 568.2 ∗ (chl_tot) -0.746. where z_eu = 200 ∗ (chl_tot) -0.293 if chl < 1, chl_tot = 38 ∗ chl 0.425 if chl >= 1, chl_tot = 40.2 ∗ chl 0.507 and if z_eu <= 102,