particular relating to - and the important thing in particular relating to the l and the important thing in - particular relating to the oceans is that these — particular relating to the oceans is that these changes _ particular relating to the oceans is that these changes may— particular relating to the oceans is that these changes may occur- particular relating to the oceans isi that these changes may occur quite abruptly— that these changes may occur quite abruptly and — that these changes may occur quite abruptly and so _ that these changes may occur quite abruptly and so the _ that these changes may occur quite abruptly and so the study _ that these changes may occur quite abruptly and so the study that - that these changes may occur quite abruptly and so the study that we l abruptly and so the study that we are talking — abruptly and so the study that we are talking about _ abruptly and so the study that we are talking about is _ abruptly and so the study that we are talking about is referring - abruptly and so the study that we are talking about is referring to l are talking about is referring to changes — are talking about is referring to changes in— are talking about is referring to changes injust _ are talking about is referring to changes in just the _ are talking about is referring to changes in just the next - are talking about is referring to changes in just the next 20—30| changes in just the next 20—30 years — changes in just the next 20—30 years. although _ changes in just the next 20—30 years. although these - changes in just the next 20—30 years. although these changesj changes in just the next 20—30 - years. although these changes may occur _ years. although these changes may occur quickly, — years. although these changes may occur quickly, the _ years. although these changes may occur quickly, the ocean— years. although these changes may occur quickly, the ocean will- occur quickly, the ocean will actually _ occur quickly, the ocean will actually take _ occur quickly, the ocean will actually take a _ occur quickly, the ocean will actually take a very - occur quickly, the ocean will actually take a very long - occur quickly, the ocean will. actually take a very long time occur quickly, the ocean will- actually take a very long time then to recatihrate — actually take a very long time then to recalibrate and _ actually take a very long time then to recalibrate and to _ actually take a very long time then to recalibrate and to recirculate . actually take a very long time then to recalibrate and to recirculate so| to recalibrate and to recirculate so these _ to recalibrate and to recirculate so these are — to recalibrate and to recirculate so these are changes _ to recalibrate and to recirculate so these are changes that _ to recalibrate and to recirculate so these are changes that could - to recalibrate and to recirculate so| these are changes that could occur on a very— these are changes that could occur on a very short _ these are changes that could occur on a very short time _ these are changes that could occur on a very short time scale - these are changes that could occur on a very short time scale but - these are changes that could occur on a very short time scale but the i on a very short time scale but the effect _ on a very short time scale but the effect and — on a very short time scale but the effect and the _ on a very short time scale but the effect and the impact _ on a very short time scale but the effect and the impact of - on a very short time scale but the effect and the impact of that - on a very short time scale but the i effect and the impact of that could last for— effect and the impact of that could last for many— effect and the impact of that could last for many centuries. _ effect and the impact of that could last for many centuries.— last for many centuries. doctor thomas, last for many centuries. doctor thomas. i _ last for many centuries. doctor thomas, i want _ last for many centuries. doctor thomas, i want to _ last for many centuries. doctor thomas, i want to just - last for many centuries. doctor thomas, i want to just bring i last for many centuries. doctor thomas, i want to just bring in| last for many centuries. doctor- thomas, i want to just bring in the rest of the panel and also sir david because some of what you are saying reflects what sir david had mentioned. doctor thomas they're talking about looking at the past impact. you mentioned that simply we are not getting the changes, we are not understanding how quickly this is happening and the gravity of it, whether it's is happening and the gravity of it, whether its net zero or what is happening to our oceans and i wonder if you get your thoughts on that. what i have been focusing on is what