translate English to French: Sulphate inputoutput budgets at ELA shifted from generally negative in the 1970s (average of -11% compared to bulk deposition inputs) to mainly positive in the 1980s (average of +5%), possibly indicating that a new equilibrium had been reached.
De maniÃ¨re gÃ©nÃ©rale, les bilans entrÃ©e-sortie des sulphates Ã l'ELA sont passÃ©s de nÃ©gatifs durant les annÃ©es 1970 (moyenne de -11 % relativement aux entrÃ©es par les dÃ©pÃ´ts bruts) Ã positifs pour la plupart durant les annÃ©es 1980 (moyenne de +5 %), ce qui laisse supposer qu'un nouvel Ã©quilibre aurait Ã©tÃ© atteint.