Renard, B., Lang, M., Neppel, L., Gailhard, J., Bois, P., Dupeyrat, A., Mestre, O., Niel, H., Sauquet, E., Prudhomme, C., Parey, S., Paquet, E.. American Geophysical Union; 2008. Regional methods for trend detection: assessing field significance and regional consistency.