I am an isotope geochemist studying chemical weathering and the cycling of elements in the Earth’s 'critical zone'. To understand the complex interactions between rock, water, soil, air and organisms I study rivers in the Himalayan mountains and Ganges floodplain, which form some of the largest continental conveyor belts of nutrients and sediments to the ocean.I also study the chemistry of rivers in the Swedish boreal landscape. To decipher the processes controlling river chemistry I use a combination of non-traditional stable isotopes (lithium, magnesium and nickel isotopes) and reactive transport modelling