Media type: E-Article Title: Developing objective dry spell and drought triggers for drought monitoring in the Niger Basin of West Africa Contributor: Okpara, J. N.; Ogunjobi, K. O.; Adefisan, E. A. imprint: Springer Science and Business Media LLC, 2022 Published in: Natural Hazards Language: English DOI: 10.1007/s11069-022-05273-3 ISSN: 0921-030X; 1573-0840 Origination: Footnote: