Element flux to the environment of the passively degassing crater lake-hosting Kawah Ijen volcano, Indonesia, and implications for estimates of the global volcanic flux van HinsbergVincent VigourouxNathalie PalmerStephanie BerloKim MauriGuillaume Williams-JonesAnthony McKenzieJeffrey Williams-JonesGlyn FischerTobias 2015 The full datasets of water and fumarole gas chemical analyses